Accommodation Flashcards
What’s the normal AoA of a 5 year old?
15D
What’s the normal AoA of a 10 year old?
12.5D
What’s the normal AoA of a 20 year old?
9.75D
What’s the normal AoA of a 30 year old?
7.25D
What’s the normal AoA of a 40 year old?
4D
What’s the normal AoA of a 50 year old?
2.5D
What’s the normal AoA of a 60 year old?
1.25D
What’s the normal AoA of a 70 year old?
0.50D
What’s the normal AoA of a 75 year old?
0D
What’s the normal near point of a 5 year old?
5cm
What’s the normal near point of a 10 year old?
8cm
What’s the normal near point of a 20 year old?
10cm
What’s the normal near point of a 30 year old?
14cm
What’s the normal near point of a 40 year old?
25cm
What’s the normal near point of a 50 year old?
40cm
What’s the normal near point of a 60 year old?
80cm
What’s the normal near point of a 70 year old?
200cm
What’s the normal near point of a 75 year old?
Infinity
What is accommodative lag?
Using less accommodation than needed
Essentially looking ‘behind’ target so can focus further than target
What is accommodative lead?
Using more accommodation than needed
Essentially looking ‘in front’ of target so can focus at a closer distance
What is a normal accommodative lag for pre-presbyopes?
+0.25-+0.75D
What could a result of +1.00D or more on dynamic ret mean?
Near eso (conv system compensating for insuff accomm)
Accomm dysfunction
Undercorrected hyperope
Overcorrected myope
What could a result of +2.00D or more on dynamic ret mean?
Presbyopic
What could a result of -0.25D or more on dynamic ret mean?
Near exophoria
Accomm spasm
Undercorrected myope
Latent hyperope
