American Conference on Pediatric Cerebral Visual Impairment
1. A National Conference on
The Evaluation and Treatment of
Pediatric Cerebral Visual Impairment
The Children’s Hospital and
Medical Center of Omaha, NE
2. Dominick M. Maino, O.D., M.Ed., F.A.A.O.
Professor, Pediatrics/Binocular Vision Service
Illinois College of Optometry
Illinois Eye Institute
3241 S. Michigan Ave. Chicago, Il. 60616
312-949-7280 (Voice) 312-949-7358 (fax)
dmaino@ico.edu www.ico.edu
LyonsFamilyEyeCare.com
MainosMemos.blogspot.com
7. Pediatric Cerebral Visual Impairment
• North America
•Cortical Visual Impairment
• Elsewhere
•Cerebral Visual Impairment
8. Pediatric Cerebral Visual Impairment
• History of CVI
• Brain injury 19th century
with Phineas P. Gage
9. Pediatric Cerebral Visual Impairment
• World War I, wounded
veterans with brain injury
• Displayed perceived
motion in the “blind, non-
seeing” visual field.
• Ability to sense motion,
lights, and colors
• Conscious or
subconscious.
10. Pediatric Cerebral Visual Impairment
• Statokinetic dissociation (in children)
• greater reduction in sensitivity to stationary visual
stimuli relative to similar targets in motion
• Riddoch phenomenon (adults)
• Ability to sense movement even though blind
• “See” moving objects…but not stationary ones
• Blindsight
• Ability to ‘sense’ objects in the way
11. Pediatric Cerebral Visual Impairment
• Statokinetic dissociation (in children)
• Movement in the peripheral visual field may elicit a smile
in the blind child with quadraplegia and profound
intellectual disability.
• Children who are fed with a spoon may intermittently open
their mouths to receive food when the spoon is moved in an
arc from the peripheral visual fields, but not when it
approaches the mouth from straight ahead.
12. Pediatric Cerebral Visual Impairment
• Statokinetic dissociation (in children)
• For those children who understand language stating what is
being seen as the child reacts to it may enhance both visual
and language development.
• Such children may rock to and fro. Whether this generates
an image is difficult to know.
• Rarely, children with cerebral blindness who are mobile
move slowly around obstacles. This phenomenon has been
called travel vision.
13. Pediatric Cerebral Visual Impairment
• 1980’s adults with bilateral occipital cortex
insult (cortical blindness)
• Term applied to children.
• Cortical visual impairment used in the
1980’s onward
• Definition of CVI includes injury lateral
geniculate nucleus/visual cortex
14. Pediatric Cerebral Visual Impairment
•Reduced visual acuity identifying
feature.
•Many children damage to white
matter surrounding the ventricals
(perventricular leukomalacia PVL)
•Cerebral Visual Impairment now used
(especially in Europe)
15. Pediatric Cerebral Visual Impairment
• Cerebral visual impairment: inclusive term
• Reduced visual acuity
• Oculomotor anomalies
• Visual field loss
• Vision information processing problems
• Cognitive Visual Dysfunction (CVD)
• Used to identify visual perceptual anomalies
• Used to identify vision information processing
problems
16. Pediatric Cerebral Visual Impairment
• Classification of CVI
• Ocular visual impairment: Refractive state. Optics, Eye
health
• Cerebral visual impairment: Neuro-pathway problems,
cortical problems, oculomotor dysfunction, vision
information processing (dorsal and ventral streaming
processing mechanisms)
17. Pediatric Cerebral Visual Impairment
The ventral stream (also known as the "what pathway")
travels to the temporal lobe and is involved with object
identification. The dorsal stream (or, "where pathway")
terminates in the parietal lobe and process spatial locations.
18. Pediatric Cerebral Visual Impairment
• Delayed Visual Maturation (DVM)
• DVM type I Visually impaired infants: improved
visual abilities by the age of 6 months, often
without treatment.
• DVM type II: attention problems, associated with
neurological/learning abnormalities. Improvement
takes longer
• DVM III: children have nystagmus, albinism.
Vision improves later, can improve to low-normal
levels.
• DVM IV: associated with retinal,
optic nerve, macular anomalies
19. Pediatric Cerebral Visual Impairment
• Defining Other Disorders and PCVI
• Variability with defining disorders not
uncommon
• Autism rare anomaly
• Definition altered so that the number of
those on the Spectrum is now considered
epidemic
• Legal, legislative, health care,
insurance issues
20. Pediatric Cerebral Visual Impairment
• Should we be concerned about how PVCI is defined?
Absolutely!
• American Association on Intellectual and
Developmental Disabilities changed definition of
mental retardation
• Decreasing IQ cut off point from to 80 to 70
• Added adaptive behavior qualifications
• Result: instantly cured hundreds of thousands of
those with mental retardation/intellectual
disability overnight
21. Pediatric Cerebral Visual Impairment
What we call a thing is very important
To name it is to have power over it
22. PCVI: References
• Dutton GN, Bax M. (eds). Visual impairment in children due to damage to the
brain. Clinics in Developmental Medicine. no 186. MacKieth Press.
London;2010.
• Strategies for dealing with visual problems due to cerebral visual impairment:
Gillian McDaid, Debbie Cockburn, Gordon N Dutton available from
http://www.ssc.education.ed.ac.uk/courses/vi&multi/vjan08i.html
• Alesterlund L, Maino D. That the blind may see: A review: Blindsight and its
implications for optometrists. J Optom Vis Dev 1999;30(2):86-93
• Kran B. Mayer L. Vision impairment and brain damage. In Taub M,
Bartuccio M, Maino D. (Eds) Visual Diagnosis and Care of the Patient with
Special Needs. Lippincott Williams & Wilkins , NY, New York; 2012:135-
146.
23. PCVI: References
• Colenbrander A. What’s in a name? Appropriate terminology
for CVI. J Vis Impair Blind. 2010:583-585
• Roman Lantzy CA, Lantzy A. Outcomes and opportunities: A
study of children with cortical visual impairment. J Vis Impair
Blind. 2010:649-653.
• http://www.aph.org/cvi/define.html
• Cerebral Visual Impairment in Periventricular Leukomalacia:
MR Correlation: Available from
http://www.ajnr.org/content/17/5/979.full.pdf
24. Pediatric Cerebral Visual Impairment
Determining Vision Function and
Functional Vision in Children with
Pediatric Cerebral Visual Impairment
25. Pediatric Cerebral Visual Impairment
Determining Vision Function and Functional Vision in Children
with Pediatric Cerebral Visual Impairment
• Need to assess vision function and
functional vision
• Vision function
•Clarity of vision (visual acuity,
contrast sensitivity, refractive error,
Amblyopia)
26. Pediatric Cerebral Visual Impairment
Determining Vision Function and Functional Vision in Children
with Pediatric Cerebral Visual Impairment
• Oculomotor ability (pursuits and saccades;
convergence and divergence, strabismus)
•Pursuits/Visual Tracking
•Saccades
27. Pediatric Cerebral Visual Impairment
Determining Vision Function and Functional Vision in Children
with Pediatric Cerebral Visual Impairment
• Binocular Vision
• Convergence insufficiency/excess
• Divergence insufficiency/excess
• Strabismus
• Exotropia
• Esotropia
• Hypertropia
28. Pediatric Cerebral Visual Impairment
Determining Vision Function and Functional Vision in Children
with Pediatric Cerebral Visual Impairment
• Accommodation (focusing)
• Accommodative insufficiency
• Accommodative excess
• Ill-sustained accommodation
• Accommodative instability
29. Pediatric Cerebral Visual Impairment
Determining Vision Function and Functional Vision in
Children with Pediatric Cerebral Visual Impairment
• Depth perception (3D vision)
• Binocular vision (Stereoscopy) is the ability to align and focus both eyes
accurately on an object and then combine the visual images from each eye into
a single, clear, three dimensional perception. Difficulty seeing in 3D can arise
when eye fatigue occurs, forcing the eyes to make adjustments to focus
simultaneously on images that are near and far away.
• Symptoms indicating a potential problem viewing images in 3D can vary,
but some common symptoms include headaches, blurred vision, nausea
and dizziness.
30. Pediatric Cerebral Visual Impairment
Determining Vision Function and Functional Vision in Children
with Pediatric Cerebral Visual Impairment
• Eye health
• Cornea, lens, pupil,
• iris, vitreous, optic nerve,
• retina
• Visual Cortex
• Other areas of the brain (motor,
• executive function)
31. Pediatric Cerebral Visual Impairment
Determining Vision Function and Functional Vision in Children
with Pediatric Cerebral Visual Impairment
• Special diagnostic tools
• EOG (electrooculogram)
• ERG (electroretinogram)
• VER/VEP (visually evoked
response visual evoked potential)
32. Pediatric Cerebral Visual Impairment
Vision Function of Children with Disability
Down Syndrome: Visual Acuity, Refractive Error,
Strabismus/Oculomotor, Accommodation, Ocular health, Vision
Information Processing, Other
Cerebral Palsy: Visual Acuity, Refractive Error,
Strabismus/Oculomotor, Accommodation, Ocular Health, Vision
Information Processing, Other
Brain Injury: Visual Acuity, Refractive Error,
Strabismus/Oculomotor, Accommodation, Ocular Health, Vision
Information Processing, Other
33. Pediatric Cerebral Visual Impairment
Functional vision
Functionally induced disability that
overlays pathologically induced
disability
• Uncorrected refractive error
• Amblyopia
• On top of vision loss due
• to cerebral impairment
• Down Syndrome
• Cerebral Palsy
35. References
• Luek AH. Cortical or cerebral visual impairment in children: A brief overview.
J Vis Impair Blind. 2010:585-592.
• Woodhouse JM, Maino DM. Down syndrome: In Taub M, Bartuccio M, Maino
D. (Eds) Visual Diagnosis and Care of the Patient with Special Needs.
Lippincott Williams & Wilkins , NY, New York; 2012:31-40.
• Wesson M, Maino D. Oculo-visual findings in Down syndrome, cerebral palsy,
and mental retardation with non-specific etiology. In Maino D (ed). Diagnosis
and Management of Special Populations. Mosby-Yearbook, Inc. St. Louis, MO.
1995:17-54.
• Taub M, Reddell A. Cerebral Palsy. In Taub M, Bartuccio M, Maino D. (Eds)
Visual Diagnosis and Care of the Patient with Special Needs. Lippincott
Williams & Wilkins , NY, New York; 2012:21-30.
36. References
• Ciuffreda K, Kapoor N. Acquired brain injury. In Taub M,
Bartuccio M, Maino D. (Eds) Visual Diagnosis and Care of
the Patient with Special Needs. Lippincott Williams &
Wilkins , NY, New York; 2012:95-100.
• Roman-Lantzy, C. Cortical visual impairment: An
approach to assessment and intervention. AFB Press, NY,
New York; 2007.
• http://www.3deyehealth.org/
• http://www.MainosMemos.blogspot.com
37. Pediatric Cerebral Visual Impairment
Therapeutic Strategies for the
Treatment of
Pediatric Cerebral Visual Impairment
38. Pediatric Cerebral Visual Impairment
• Treatment begins with the basics.
•Vision function
•Refractive correction
•Spectacles therapeutic
•Eye health
45. Pediatric Cerebral Visual Impairment
How Do Environmental Factors, Medications
and Non-Visual Handicaps Affect the
Evaluation and Treatment of Pediatric
Cerebral Visual Impairment?
46. Pediatric Cerebral Visual Impairment
For individuals with disability…
• Medications: Prescribed many more medications
• Higher affinity for adverse effects due to environmental/systemic
factors
• Seldom complain of symptoms related to their disability, systemic
anomalies, or medication side effects
47. Pediatric Cerebral Visual Impairment
• Alternative and complementary
medical therapies
Maino D. Evidence based medicine and CAM: a review. Optom Vis Dev 2012;43(1):13-17
Lemer P. Complementary and Alternative Approaches. In Taub M, Bartuccio M, Maino D.
Visual Diagnosis and Care of Patients with Special Needs. Lippincott, Williams, Wilkins. 2012
• Traditional allopathic approaches
48. Pediatric Cerebral Visual Impairment
• Mental illnesses in children
• Pediatric Bipolar disorder
• Pediatric depression
49. Pediatric Cerebral Visual Impairment
• Major environmental hazard: People
• do not know how to respond
• make assumptions
• true for lay individuals, teacher, health
care professionals
• Other
53. Medication Side Effects
Tranquilizers
Breast development in men Risk of narrow angle GLC
Breathing problems Cycloplegia/Mydriasis
Insomnia Decreased vision
Tardive dyskinesia Capsular cataract
55. Dominick M. Maino, O.D., M.Ed., F.A.A.O.
Professor, Pediatrics/Binocular Vision Service
Illinois College of Optometry
Illinois Eye Institute
3241 S. Michigan Ave. Chicago, Il. 60616
312-949-7280 (Voice) 312-949-7358 (fax)
dmaino@ico.edu www.ico.edu
LyonsFamilyEyeCare.com
MainosMemos.blogspot.com