Ametropia

Question 1

Manifest hyperopia

Answer 1

amount of hyperopia found on subjective refraction

Question 2

Latent hyperopia

Answer 2

remaining hyperopia found after cycloplegia

Manifest = +1.00D
Cyclo'd = +2.00D
Latent = +1.00D (2-1)

Question 3

Absolute hyperopia

Answer 3

amount that cannot be overcome by accommodation

4D of hyperopia
1D of accommodation
Absolute = 3D

Question 4

Facultative hyperopia

Answer 4

amount that can be overcome by accommodation

4D of hyperopia
1D of accommodation
Facultative = 1D

Question 5

Latent hyperopies will have a LEAD or LAG in accommodation?

Answer 5

LAG.

Latent hyperopes have to accommodate at distance to account for uncorrected refractive eroror. Near would result in further accommodation and likely lag due to fatigue.

Question 6

What is a NORMAL result for MEM?

Answer 6

+0.25 to +0.50D (represents a small lag)

Question 7

What is an ABNORMAL result for MEM?

Answer 7

> +0.50D (large lag) or any minus (a lead)

Question 8

With-the-rule astigmatism

Answer 8

Negative cyl on 180 axis

Question 9

What add should be prescribed for the followign:

NRA: +3.50
PRA: -1.50

Answer 9

Add: +1.00

(PRA + NRA)/2 = ADD

Question 10

Amplitude of accommodation

Answer 10

18.5 - 0.3(age)

Question 11

If a patient says the green eye chart looks clearer than the red part of the chart - what needs to be tweaked for the Rx?

Answer 11

MORE PLUS!

RAM-GAP
Red add minus || Green add plus

Question 12

What is the mohindra technique?

Answer 12

• pitch dark
• retinoscope

AGE:
<2 = -0.75D (assumes tonic of 1.25D)
<6 = -1D
>6 = -1.25D