Defectos refractivos
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Este documento describe la presbicia, una condición ocular común relacionada con la edad. Explica que la presbicia comienza típicamente entre los 40 y 45 años cuando los músculos ciliares pierden tono y la vista de cerca empeora. Se corrige con lentes positivos cuya graduación, conocida como adición, aumenta con la edad según una tabla provista.
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Defectos refractivos
Este documento describe la presbicia, una condición ocular común relacionada con la edad. Explica que la presbicia ocurre cuando los músculos ciliares y el cristalino pierden flexibilidad con la edad, lo que dificulta la visión de cerca. Proporciona una tabla que recomienda valores de adición de lentes positivos según la edad para corregir la presbicia.
Defectos refractivos
Este documento describe la presbicia, una condición ocular común relacionada con la edad. Explica que la presbicia ocurre cuando los músculos ciliares y el cristalino pierden flexibilidad con la edad, lo que dificulta la visión de cerca. Proporciona una tabla que recomienda valores de adición de lentes positivos según la edad para corregir la presbicia.
Papilledema
PAPILLOEDEMA
- Oedema of the optic disc caused by increased intracranial pressure. This blocks axoplasmic transport, causing swelling of the optic nerve head.
- Symptoms include blurred vision, visual field defects, and over time potential blindness if not treated.
- Diagnosis is made through examination showing blurred disc margins, venous congestion, retinal exudates, and imaging showing disc swelling. Treatment aims to relieve intracranial pressure through surgical or medical means to prevent permanent nerve damage.
Disfunciones del sistema acomodativo
Este documento describe las diferentes disfunciones del sistema acomodativo, incluyendo insuficiencia acomodativa, fatiga acomodativa, inflexibilidad acomodativa, espasmo acomodativo, exceso acomodativo y parálisis acomodativa. Define los síntomas, signos, etiología, diagnóstico y tratamiento de cada una. También cubre las disfunciones acomodativas secundarias a problemas de visión binocular o refractivos.
Light injury
Light and laser sources can cause retinal injury through photochemical and thermal mechanisms. The retina is susceptible to damage from sunlight, welding arcs, medical instruments like operating microscopes, and lasers. Protective mechanisms like the cornea, lens, and retinal pigment help absorb harmful wavelengths. Retinal injuries present as yellow lesions and can cause vision loss, though recovery is possible. Precautions like filters, goggles, and minimizing exposure times are important to prevent light and laser injuries.
Fine art of prescribing glasses by jasmin ( Raees Optom ) modi
Here is a totally explanation & understanding about Dispensing is an art itself by presenter It would also available in youtube you can check out now,
https://youtu.be/GLBkVQREy2U
Visual rehabilitation after pediatric cataract surgery
Cataract surgery in a child is only a beginning to the long way of rehabilitating the child and helping the baby to learn to see and recognize and adjust to the world.
Pachychoroid spectrum diseases
This document discusses imaging techniques used to identify and characterize the pachychoroid phenotype. Key features of the pachychoroid phenotype include choroidal vascular hyperpermeability on ICGA, increased choroidal thickness on OCT imaging, and pathologically dilated choroidal vessels. Advanced imaging such as EDI-OCT, SS-OCT, and ultrawide field imaging have provided more detailed analysis of choroidal abnormalities associated with diseases like central serous chorioretinopathy and polypoidal choroidal vasculopathy. Identification of the pachychoroid phenotype helps explain the spectrum of clinical manifestations in these diseases.
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Defectos refractivos
Este documento describe la presbicia, una condición ocular común relacionada con la edad. Explica que la presbicia ocurre cuando los músculos ciliares y el cristalino pierden flexibilidad con la edad, lo que dificulta la visión de cerca. Proporciona una tabla que recomienda valores de adición de lentes positivos según la edad para corregir la presbicia.
Defectos refractivos
Este documento describe la presbicia, una condición ocular común relacionada con la edad. Explica que la presbicia ocurre cuando los músculos ciliares y el cristalino pierden flexibilidad con la edad, lo que dificulta la visión de cerca. Proporciona una tabla que recomienda valores de adición de lentes positivos según la edad para corregir la presbicia.
Papilledema
PAPILLOEDEMA
- Oedema of the optic disc caused by increased intracranial pressure. This blocks axoplasmic transport, causing swelling of the optic nerve head.
- Symptoms include blurred vision, visual field defects, and over time potential blindness if not treated.
- Diagnosis is made through examination showing blurred disc margins, venous congestion, retinal exudates, and imaging showing disc swelling. Treatment aims to relieve intracranial pressure through surgical or medical means to prevent permanent nerve damage.
Disfunciones del sistema acomodativo
Este documento describe las diferentes disfunciones del sistema acomodativo, incluyendo insuficiencia acomodativa, fatiga acomodativa, inflexibilidad acomodativa, espasmo acomodativo, exceso acomodativo y parálisis acomodativa. Define los síntomas, signos, etiología, diagnóstico y tratamiento de cada una. También cubre las disfunciones acomodativas secundarias a problemas de visión binocular o refractivos.
Light injury
Light and laser sources can cause retinal injury through photochemical and thermal mechanisms. The retina is susceptible to damage from sunlight, welding arcs, medical instruments like operating microscopes, and lasers. Protective mechanisms like the cornea, lens, and retinal pigment help absorb harmful wavelengths. Retinal injuries present as yellow lesions and can cause vision loss, though recovery is possible. Precautions like filters, goggles, and minimizing exposure times are important to prevent light and laser injuries.
Fine art of prescribing glasses by jasmin ( Raees Optom ) modi
Here is a totally explanation & understanding about Dispensing is an art itself by presenter It would also available in youtube you can check out now,
https://youtu.be/GLBkVQREy2U
Visual rehabilitation after pediatric cataract surgery
Cataract surgery in a child is only a beginning to the long way of rehabilitating the child and helping the baby to learn to see and recognize and adjust to the world.
Pachychoroid spectrum diseases
This document discusses imaging techniques used to identify and characterize the pachychoroid phenotype. Key features of the pachychoroid phenotype include choroidal vascular hyperpermeability on ICGA, increased choroidal thickness on OCT imaging, and pathologically dilated choroidal vessels. Advanced imaging such as EDI-OCT, SS-OCT, and ultrawide field imaging have provided more detailed analysis of choroidal abnormalities associated with diseases like central serous chorioretinopathy and polypoidal choroidal vasculopathy. Identification of the pachychoroid phenotype helps explain the spectrum of clinical manifestations in these diseases.
Auto perimetry
This document discusses automated perimetry and the interpretation of visual field tests. It covers perimeter logic and identifying field defects, criteria for glaucomatous defects, and detecting glaucomatous progression. Key points include interpreting visual fields systematically using total and pattern deviation plots in 8 zones, criteria for identifying glaucomatous defects including abnormalities in the pattern deviation plot, global indices, and techniques for detecting progression such as the overview program and Glaucoma Progression Analysis. Interpretation requires correlating results with clinical findings and considering factors like learning effects and fluctuation.
Vitreous degeneration
Vitreous degeneration occurs as the vitreous gel in the eye begins to liquefy and shrink with age. This can cause floaters which appear as spots or lines moving in the vision. In advanced cases, the vitreous may detach from the retina. There are three main types: benign floaters which do not affect vision, symptomatic floaters which cause flashes of light and may lead to retinal detachment, and degenerative vitreous syndrome which severely impacts vision. While floaters typically do not require treatment, retinal tears or detachments may require laser treatment or vitrectomy surgery to remove the vitreous gel.
41 principles retinal detachment surgery
This document outlines principles of retinal detachment surgery, including scleral buckling procedures, pneumatic retinopexy, and vitrectomy. Scleral buckling involves configuring scleral buckles, localizing retinal breaks, applying cryotherapy, and inserting an explant. Pneumatic retinopexy uses gas injection and postoperative positioning. Vitrectomy is used for giant retinal tears, proliferative vitreoretinopathy, and diabetic tractional retinal detachments to release traction and unfold retinal flaps. The causes and techniques addressed aim to reattach the retina and prevent early failure.
Keratometer Slides
A keratometer is an instrument that measures the curvature of the cornea to detect and quantify astigmatism. It provides measurements of the flattest and steepest meridians of the cornea in diopters. Manual keratometry is preferred for certain patients and when performing toric IOL calculations, while corneal topography can provide additional information about the anterior corneal surface. Proper use and calibration of the keratometer is important for obtaining accurate measurements.
Retinal breaks
This document discusses retinal breaks and retinal detachment. Some key points:
- Retinal breaks can cause retinal detachment and occur in about 6% of the population, with retinal detachment occurring in around 0.07% of people in their lifetime.
- Common causes of retinal breaks include trauma, vitreous traction, and increasing age. Symptoms may include floaters, photopsias, and vitreous hemorrhage.
- Examination involves slit lamp biomicroscopy and sometimes B-scan ultrasound or vitrectomy. Certain lesions like retinal dialysis, horseshoe tears, and operculated tears often warrant treatment to prevent retinal detachment, while smaller lesions may not require intervention
What is Convergence Insufficiency?
Convergence insufficiency is one of the most frequently encountered binocular vision problem in children and adults. It is often associated with a variety of symptoms, including eyestrain, headaches, blurred vision, diplopia [double vision], sleepiness, difficulty concentrating, movement of print while reading, and loss of comprehension after short periods of reading or performing close activities. Have your doctor diagnose and treat this significant visual problem.
Basics of phacodynamics
This document provides an overview of the basics of phacoemulsification including machine technology, irrigation and aspiration handpieces, peristaltic pumps, venturi pumps, foot pedal functions, and power variables. Key points include:
- Phacoemulsification uses ultrasonic energy from a piezoelectric crystal to emulsify cataracts.
- Machine technology includes ultrasonic handpieces, irrigation/aspiration tips, and peristaltic or venturi pumps to provide vacuum.
- The foot pedal controls irrigation only, irrigation with aspiration, or full function with ultrasound emission.
- Power is determined by factors like nucleus density, tip engagement, and linear tip velocity to safely sculpt
Maculopatía miópica
Este documento describe la maculopatía miópica, incluyendo la neovascularización coroidea y la maculopatía traccional. La maculopatía miópica afecta a personas con alta miopía y puede causar ceguera. Se clasifica en estadios dependiendo de los hallazgos en el fondo de ojo. El tratamiento para la neovascularización coroidea incluye anti-VEGF e fotocoagulación, mientras que la cirugía de vitrectomía es útil para la maculopatía traccional. Los pacientes con alta
contact lens fitting in keratoconnus
contact lens option
soft lenses in keratoconnus
rgp in keratoconnus
piggy bank lenses
hybrid lens system
fitting metodologies
fitting protocol
three point touch design
apical clearence
flat fitting
keratocoonus managment
contact lens fitting objective in keratoconnus
combination lens system
corneal lenses
trapezoid lenses
spherical thick positive lens
toric lens
moderate advance keratoconnus
scleral lenses
optometry
opthalmology
optometrist
eye disorder
cornea
eye problem
cone
vision
corneal physiology
lens comfort
mid periphery area
toric lens
astigmatism
correction
novakone
bausch&lomb
rigid gas permeable
health and fitness
eye treatment
surgery
rose k
profile k
patient
eye care regime
Basic pentcam for refractive surgery decision
1. The document discusses corneal tomography using Pentacam, including its basic principles, readings, and uses for refractive surgery decision making and other applications.
2. It provides guidelines for assessing risk factors based on topography, refractive error range, and patient characteristics to determine if LASIK or PRK is recommended or if the patient is high risk.
3. Several case studies are presented to demonstrate how tomography findings would be used to make decisions about refractive surgery procedure and treatment plan.
Corneal edema after cataract surgery - MALEK AL KOTT
This document summarizes the structure and function of the cornea, with a focus on the endothelium and causes of corneal edema. It discusses the cornea's five layers, with details on the endothelium and its pump functions. Causes of corneal edema include loss of endothelial cells from aging, surgery, diseases like Fuchs endothelial dystrophy, intraoperative injuries from instruments or ultrasound, and postoperative issues like glaucoma or toxic anterior segment syndrome. The document also outlines examination techniques for the cornea like slit lamp, specular microscopy, and pachymetry.
Interpretation of visual fields with special reference to octopus
The document provides an overview of visual field interpretation using the Octopus perimeter. It discusses what a visual field is, why they are important, and types of perimetry including static and kinetic. It describes advantages of different test strategies like TOP and SITA fast that can reduce test time. Key aspects of the Octopus 7-in-1 printout are outlined including demographic data, reliability indices, threshold values compared to norms, and mean deviation and pattern deviation plots.
viewing systems in vitrectomy
comprehensive detailed insight in options available for viewing system in vitrectomy and retina surgery especially in asia
Neuro-ophthalmology
This document discusses neuro-ophthalmology and is presented by Dr. Lee Ming Yueh. It covers various topics including visual pathway and visual field defects, the optic disc, pupils, and cranial nerve palsies with eye manifestations. For visual field defects, it describes different testing methods and lesion locations that can cause specific defect patterns. The optic disc section discusses conditions like edema, atrophy, and swelling. Pupils are described in terms of innervation, size, shape, and defects. Finally, different cranial nerve palsies are outlined, focusing on causes, clinical features, investigations, and management considerations for nerves III-VII.
visual field analysis
The document discusses visual field testing techniques including kinetic methods using moving targets and static methods using stationary targets. It describes common visual field parameters like isopters and various pathologies that can cause visual field defects like glaucoma. Standardized tests are discussed including the tangent screen test and different algorithms used for static threshold tests like SITA. Key aspects of visual field analyzer equipment and reliable interpretation of results are also covered.
Retinitis pigmentosa and allied disorders
Retinitis pigmentosa is a group of inherited retinal diseases characterized by progressive vision loss. It has a prevalence of 1 in 3500 people. The document discusses the various types of retinitis pigmentosa based on inheritance patterns and symptoms. It also summarizes the clinical features, investigations, management, and associated syndromes of retinitis pigmentosa.
Double elevator palsy
1. Monocular elevation deficiency (MED), also known as double elevator palsy, is characterized by an inability to elevate one eye in all fields of gaze, resulting in hypotropia of the affected eye.
2. The condition can be congenital or acquired, with causes including superior rectus palsy, inferior rectus restriction, and supranuclear lesions.
3. Surgical management of MED depends on forced duction test results and may include inferior rectus recession, superior rectus resection, or Knapp's procedure to transpose the horizontal rectus muscles. The goal is to improve eye position and increase binocular vision.
JNTERPRETATION OF SINGLE FIELD PRINTOUT FROM HUMPHREY'S
Verify patient data and test details to ensure reliability
Analyze total deviation and pattern deviation plots to identify localized scotomas, accounting for overall depression
Interpret mean deviation (MD) and pattern standard deviation (PSD) to assess hill of vision and irregularities
Use Glaucoma Hemifield Test (GHT) analysis and Anderson's criteria to diagnose glaucomatous visual field defects if disc features match
Consider lens rim artifacts, media opacities, refractive errors, pupil size, and other ocular causes when interpreting results
Principle of presbyopia correcting iols
This document discusses different types of intraocular lenses (IOLs) used to correct presbyopia. It begins by explaining that monofocal IOLs only correct far vision and do not provide near vision correction without glasses. It then describes multifocal IOLs, including bifocal and trifocal lenses, which aim to provide both near and far vision corrections simultaneously. The document discusses key principles and technologies used in multifocal IOLs, specifically refractive lenses with multiple zones, diffractive lenses using interference patterns, and apodized diffractive lenses. It provides details on specific IOL models and compares technologies between traditional bifocal, trifocal, and newer trifocal lenses.
RETINAL DETACHMENT AND PREDISPOSING LESIONS lecture by Iddi.pptx
This document discusses retinal detachment and predisposing lesions. It defines various types of retinal breaks including flap tears, giant retinal tears, operculated holes, and atrophic holes. It also covers posterior vitreous detachment and lesions that can predispose the eye to retinal detachment such as lattice degeneration, vitreoretinal tufts, and meridional folds. The document provides guidance on prophylactic treatment of retinal breaks and discusses differential diagnosis and management of retinal detachment.
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Auto perimetry
This document discusses automated perimetry and the interpretation of visual field tests. It covers perimeter logic and identifying field defects, criteria for glaucomatous defects, and detecting glaucomatous progression. Key points include interpreting visual fields systematically using total and pattern deviation plots in 8 zones, criteria for identifying glaucomatous defects including abnormalities in the pattern deviation plot, global indices, and techniques for detecting progression such as the overview program and Glaucoma Progression Analysis. Interpretation requires correlating results with clinical findings and considering factors like learning effects and fluctuation.
Vitreous degeneration
Vitreous degeneration occurs as the vitreous gel in the eye begins to liquefy and shrink with age. This can cause floaters which appear as spots or lines moving in the vision. In advanced cases, the vitreous may detach from the retina. There are three main types: benign floaters which do not affect vision, symptomatic floaters which cause flashes of light and may lead to retinal detachment, and degenerative vitreous syndrome which severely impacts vision. While floaters typically do not require treatment, retinal tears or detachments may require laser treatment or vitrectomy surgery to remove the vitreous gel.
41 principles retinal detachment surgery
This document outlines principles of retinal detachment surgery, including scleral buckling procedures, pneumatic retinopexy, and vitrectomy. Scleral buckling involves configuring scleral buckles, localizing retinal breaks, applying cryotherapy, and inserting an explant. Pneumatic retinopexy uses gas injection and postoperative positioning. Vitrectomy is used for giant retinal tears, proliferative vitreoretinopathy, and diabetic tractional retinal detachments to release traction and unfold retinal flaps. The causes and techniques addressed aim to reattach the retina and prevent early failure.
Keratometer Slides
A keratometer is an instrument that measures the curvature of the cornea to detect and quantify astigmatism. It provides measurements of the flattest and steepest meridians of the cornea in diopters. Manual keratometry is preferred for certain patients and when performing toric IOL calculations, while corneal topography can provide additional information about the anterior corneal surface. Proper use and calibration of the keratometer is important for obtaining accurate measurements.
Retinal breaks
This document discusses retinal breaks and retinal detachment. Some key points:
- Retinal breaks can cause retinal detachment and occur in about 6% of the population, with retinal detachment occurring in around 0.07% of people in their lifetime.
- Common causes of retinal breaks include trauma, vitreous traction, and increasing age. Symptoms may include floaters, photopsias, and vitreous hemorrhage.
- Examination involves slit lamp biomicroscopy and sometimes B-scan ultrasound or vitrectomy. Certain lesions like retinal dialysis, horseshoe tears, and operculated tears often warrant treatment to prevent retinal detachment, while smaller lesions may not require intervention
What is Convergence Insufficiency?
Convergence insufficiency is one of the most frequently encountered binocular vision problem in children and adults. It is often associated with a variety of symptoms, including eyestrain, headaches, blurred vision, diplopia [double vision], sleepiness, difficulty concentrating, movement of print while reading, and loss of comprehension after short periods of reading or performing close activities. Have your doctor diagnose and treat this significant visual problem.
Basics of phacodynamics
This document provides an overview of the basics of phacoemulsification including machine technology, irrigation and aspiration handpieces, peristaltic pumps, venturi pumps, foot pedal functions, and power variables. Key points include:
- Phacoemulsification uses ultrasonic energy from a piezoelectric crystal to emulsify cataracts.
- Machine technology includes ultrasonic handpieces, irrigation/aspiration tips, and peristaltic or venturi pumps to provide vacuum.
- The foot pedal controls irrigation only, irrigation with aspiration, or full function with ultrasound emission.
- Power is determined by factors like nucleus density, tip engagement, and linear tip velocity to safely sculpt
Maculopatía miópica
Este documento describe la maculopatía miópica, incluyendo la neovascularización coroidea y la maculopatía traccional. La maculopatía miópica afecta a personas con alta miopía y puede causar ceguera. Se clasifica en estadios dependiendo de los hallazgos en el fondo de ojo. El tratamiento para la neovascularización coroidea incluye anti-VEGF e fotocoagulación, mientras que la cirugía de vitrectomía es útil para la maculopatía traccional. Los pacientes con alta
contact lens fitting in keratoconnus
contact lens option
soft lenses in keratoconnus
rgp in keratoconnus
piggy bank lenses
hybrid lens system
fitting metodologies
fitting protocol
three point touch design
apical clearence
flat fitting
keratocoonus managment
contact lens fitting objective in keratoconnus
combination lens system
corneal lenses
trapezoid lenses
spherical thick positive lens
toric lens
moderate advance keratoconnus
scleral lenses
optometry
opthalmology
optometrist
eye disorder
cornea
eye problem
cone
vision
corneal physiology
lens comfort
mid periphery area
toric lens
astigmatism
correction
novakone
bausch&lomb
rigid gas permeable
health and fitness
eye treatment
surgery
rose k
profile k
patient
eye care regime
Basic pentcam for refractive surgery decision
1. The document discusses corneal tomography using Pentacam, including its basic principles, readings, and uses for refractive surgery decision making and other applications.
2. It provides guidelines for assessing risk factors based on topography, refractive error range, and patient characteristics to determine if LASIK or PRK is recommended or if the patient is high risk.
3. Several case studies are presented to demonstrate how tomography findings would be used to make decisions about refractive surgery procedure and treatment plan.
Corneal edema after cataract surgery - MALEK AL KOTT
This document summarizes the structure and function of the cornea, with a focus on the endothelium and causes of corneal edema. It discusses the cornea's five layers, with details on the endothelium and its pump functions. Causes of corneal edema include loss of endothelial cells from aging, surgery, diseases like Fuchs endothelial dystrophy, intraoperative injuries from instruments or ultrasound, and postoperative issues like glaucoma or toxic anterior segment syndrome. The document also outlines examination techniques for the cornea like slit lamp, specular microscopy, and pachymetry.
Interpretation of visual fields with special reference to octopus
The document provides an overview of visual field interpretation using the Octopus perimeter. It discusses what a visual field is, why they are important, and types of perimetry including static and kinetic. It describes advantages of different test strategies like TOP and SITA fast that can reduce test time. Key aspects of the Octopus 7-in-1 printout are outlined including demographic data, reliability indices, threshold values compared to norms, and mean deviation and pattern deviation plots.
viewing systems in vitrectomy
comprehensive detailed insight in options available for viewing system in vitrectomy and retina surgery especially in asia
Neuro-ophthalmology
This document discusses neuro-ophthalmology and is presented by Dr. Lee Ming Yueh. It covers various topics including visual pathway and visual field defects, the optic disc, pupils, and cranial nerve palsies with eye manifestations. For visual field defects, it describes different testing methods and lesion locations that can cause specific defect patterns. The optic disc section discusses conditions like edema, atrophy, and swelling. Pupils are described in terms of innervation, size, shape, and defects. Finally, different cranial nerve palsies are outlined, focusing on causes, clinical features, investigations, and management considerations for nerves III-VII.
visual field analysis
The document discusses visual field testing techniques including kinetic methods using moving targets and static methods using stationary targets. It describes common visual field parameters like isopters and various pathologies that can cause visual field defects like glaucoma. Standardized tests are discussed including the tangent screen test and different algorithms used for static threshold tests like SITA. Key aspects of visual field analyzer equipment and reliable interpretation of results are also covered.
Retinitis pigmentosa and allied disorders
Retinitis pigmentosa is a group of inherited retinal diseases characterized by progressive vision loss. It has a prevalence of 1 in 3500 people. The document discusses the various types of retinitis pigmentosa based on inheritance patterns and symptoms. It also summarizes the clinical features, investigations, management, and associated syndromes of retinitis pigmentosa.
Double elevator palsy
1. Monocular elevation deficiency (MED), also known as double elevator palsy, is characterized by an inability to elevate one eye in all fields of gaze, resulting in hypotropia of the affected eye.
2. The condition can be congenital or acquired, with causes including superior rectus palsy, inferior rectus restriction, and supranuclear lesions.
3. Surgical management of MED depends on forced duction test results and may include inferior rectus recession, superior rectus resection, or Knapp's procedure to transpose the horizontal rectus muscles. The goal is to improve eye position and increase binocular vision.
JNTERPRETATION OF SINGLE FIELD PRINTOUT FROM HUMPHREY'S
Verify patient data and test details to ensure reliability
Analyze total deviation and pattern deviation plots to identify localized scotomas, accounting for overall depression
Interpret mean deviation (MD) and pattern standard deviation (PSD) to assess hill of vision and irregularities
Use Glaucoma Hemifield Test (GHT) analysis and Anderson's criteria to diagnose glaucomatous visual field defects if disc features match
Consider lens rim artifacts, media opacities, refractive errors, pupil size, and other ocular causes when interpreting results
Principle of presbyopia correcting iols
This document discusses different types of intraocular lenses (IOLs) used to correct presbyopia. It begins by explaining that monofocal IOLs only correct far vision and do not provide near vision correction without glasses. It then describes multifocal IOLs, including bifocal and trifocal lenses, which aim to provide both near and far vision corrections simultaneously. The document discusses key principles and technologies used in multifocal IOLs, specifically refractive lenses with multiple zones, diffractive lenses using interference patterns, and apodized diffractive lenses. It provides details on specific IOL models and compares technologies between traditional bifocal, trifocal, and newer trifocal lenses.
RETINAL DETACHMENT AND PREDISPOSING LESIONS lecture by Iddi.pptx
This document discusses retinal detachment and predisposing lesions. It defines various types of retinal breaks including flap tears, giant retinal tears, operculated holes, and atrophic holes. It also covers posterior vitreous detachment and lesions that can predispose the eye to retinal detachment such as lattice degeneration, vitreoretinal tufts, and meridional folds. The document provides guidance on prophylactic treatment of retinal breaks and discusses differential diagnosis and management of retinal detachment.
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Corneal edema after cataract surgery - MALEK AL KOTT
Corneal edema after cataract surgery - MALEK AL KOTT
Interpretation of visual fields with special reference to octopus
Interpretation of visual fields with special reference to octopus
JNTERPRETATION OF SINGLE FIELD PRINTOUT FROM HUMPHREY'S
JNTERPRETATION OF SINGLE FIELD PRINTOUT FROM HUMPHREY'S
RETINAL DETACHMENT AND PREDISPOSING LESIONS lecture by Iddi.pptx
RETINAL DETACHMENT AND PREDISPOSING LESIONS lecture by Iddi.pptx
Defectos refractivos
- 2. CONTENIDO ¿QUE ES? CARACTERÍSTICAS: CORRECCIÓN: ADICIÓN (ADD): TABLA DE ADICIÓN SEGÚN LA EDAD VIDEO
- 3. ¿Que es? Es una condición ocular fisiológica que con el paso del tiempo, los músculos ciliares, como el resto de los del cuerpo humano, van perdiendo tono y haciéndose menos potentes. Al mismo tiempo, el cristalino se hace menos flexible, con lo cual la capacidad para acomodar y por tanto para ver de cerca va disminuyendo con la edad.
- 4. CARACTERÍSTICAS: Comienza a manifestarse aproximadamente entre los 40 y 45 años. El síntoma inicial principal es la mala visión de cerca. Separa la lectura o la tarea de cerca y se necesita cada vez más luz. Cuando el esfuerzo es prolongado comienza la sensación de movimiento en las letras.
- 5. Corrección: Se adicionan lentes positivos con la graduación adecuada y suficiente para leer SEGÚN LA EDAD. Estos lentes pueden ser solo para la lectura llamados monofocales o pueden ser lentes que sirvan para mirar de lejos y cerca al mismo tiempo. Cada clase de bifocal tiene diferente diseño que se ha ido desarrollando según las necesidades de cada época:
- 6. ADICIÓN (Add): Es el valor dióptrico que se da a la fórmula de cerca para compensar, según la edad, la falta de acomodación progresiva. Adición Mayores de 40 Áfacos Pseudofáquicos años
- 7. EDAD ADICIÓN 40 años 1.00 TABLA DE ADICIÓN 41 – 44 años 1.25 SEGÚN LA EDAD 45 años 1.50 46 – 49 años 1.75 50 años 2.00 51 – 54 años 2.25 55 años 2.50 56 – 59 años 2.75 Mayor de 60 años, 3.00 pseudofáquicos o áfacos
- 8. ADICION 3 2.5 2 1.5 1 ADICION 0.5 0
- 9. VIDEO