Optics - Accommodation

Question 1

Before the age of 40 how many diopters of accomodation does a person lose every 4 years?

Answer 1

1D

Question 2

After the age of 48 how many diopters of accomodation does a person lose every 4 years?

Answer 2

0.5 D

Question 3

How many diopters of accomodation does a person have at age 40? 48?

Answer 3

6, 3

Question 4

What type of effect does phenylephrine have?

Answer 4

A sympathomimetic agent used for pupillary dilation alone (but has NO cycloplegic effect)

Question 5

Accomodative amplitude with hype ropes does what?

Answer 5

Hyperopia “uses up” some accommodation, so SUBTRACT spetacle correction from accomodative amplitude.

Question 6

Parasympatholytics causes what to accommodation?

Answer 6

It relaxes it and causes inadequate accomodation.

Question 7

Why do presbyopes like glasses over CLs for accommodating?

Answer 7

Myopic glasses act like base-in prisms which aids convergence.

Question 8

How much is typical divergence amplitude?

Answer 8

6PD

Question 9

How much is typical convergence amplitude?

Answer 9

14PD

Question 10

How much is vertical fusional amplitudes?

Answer 10

2PD