5 Refraction Outside The Phoropter- Attar

Question 1

Who would benefit from using a trial frame refraction?

Answer 1

High refractive errors (aphakes too), low vision, accommodative instability, or ambulatory restrictions

Nursing homes/hospitals

Bad kids

Question 2

List 5 advantages for trial frame refraction over a phoropter:

Answer 2

Wider field of view

Allows for head turning/eccentric viewing

Larger power changes are easily incorporated

Easier to compare old Rx vs new Rx

Easy mounting of low vision devices to trial frame (telescopes)

Question 3

What are the general guidelines to provide clear, comfortable vision, normal binocularity, and reduce accommodative demand?

Answer 3

Age
Degree of symptoms 
Amount of ametropia 
Visual acuity
Binocular function 
Presence of astigmatism of anisometropia