Aphakia

Question 1

What phenomenon is not associated with correcting aphakic individuals with high powered positive spectacle lenses?

Answer 1

barrel distortion

Question 2

When using the optical approach, what type of pre-operative information is NOT needed to calculate the required IOL power?

Answer 2

Corneal diameter and Refractive Error

Question 3

In determining the desired power of an intraocular lens, what ocular/lens parameters has the most impact on the power calculation?

Answer 3

Axial Length

Question 4

In order to minimize the magnification effects from aphakic spectacles, what changes can be made?

Answer 4

1. decrease the vertex distance
2. decrease the front surface power
3. decrease the thickness
4. switch the pt to the equivalent CLs or suggest IOL implant

Question 5

For an aphakic eye, the far point is where?

Answer 5

in the back of the eye