Good Stuff Happens in 1:1 Meetings: Why you need them and how to do them well
UK Guide To Laser Eye Surgery Part 2 Your Prescription
1. The
Essential
Guide to
Laser Eye
Surgery
PART 2: Reading your prescription
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FOCUS Laser Vision 0845 5000 500
2. Normal sight: Distance vision is good because
focusing is exactly on the retina
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Normal eye Refractive errors
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Refractive errors = needing glasses
• The effect of a refractive error is an image that falls somewhere
other than exactly on the retina at the back of your eyes.
Short sight
4. What does a prescription look like?
Example:
-3.00/-1.00 x 180
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5. A prescription has 3 basic numbers
Sphere (SPH) Cylinder (CYL) Axis
-3.00 -1.00 180
1 2 3
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6. A prescription has 3 basic numbers
1 Sphere (SPH) Cylinder (CYL) Axis
-3.00 -1.00 180
1 2 3
1. The basic correction, written as Sphere or SPH (because we correct it
with a spherical lens). The higher this first number, the worse the vision.
A minus means short sight and plus means long sight
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7. 2
A prescription has 3 basic numbers
Sphere (SPH) Cylinder (CYL) Axis
-3.00 -1.00 180
1 2 3
2. The amount of extra distortion from astigmatism, on top of the basic
blurring -written as Cylinder or CYL because we use a so-called
’cylindrical‘ lens to fix it.
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8. A prescription has 3 basic numbers
Sphere (SPH) Cylinder (CYL) Axis
3
-3.00 -1.00 180
1 2 3
3. The precise angle this cylinder lens should be tilted to give the sharpest
vision, written as Axis (between one degree and 180 degrees – 180 is
horizontal and 90 vertical).
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9. So what kind is this?
Example:
-3.00/-1.00 x 180
• This prescription is for short sight because it has a MINUS number first
(-3.00)
• There is a small amount of astigmatism because there is a second
number (-1.00)
• If there is no astigmatism, the second (and third) numbers are missing
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10. Presbyopia (ageing eyes)
•if you also require help
for reading, there will
be a FOURTH number
on your prescription
•this is found at the
end under ADD
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11. 4
Reading addition
Example:
Add
-3.00/-1.00 x 180 +2.00
• This reading part is called an ADD because it is in addition to your
distance prescription
• You can have this add built in to bifocal or varifocal glasses, or wear two
separate pairs, one for distance and one for reading
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13. Laser eye surgery
• All glasses problems can now
be treated with laser eye
surgery
• Biggest advances have been in
treating near vision for age
related presbyopia
• Reading correction is available
from FOCUS Laser Vision
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