Gradient AC/A value refers to the change of the accommodative set amount after the adjustment is changed by 1.00D by changing the lens.
NO.2 Poor fusion function, abnormal eye position, etc. lead to visual fatigue. Specifically, is there a problem with adjustment or collection?
Then, it can be roughly judged by AC/A inspection. If the result is too high, it may be a collection problem.
NO.3 On the basis of the degree of correction of far refractive error in both eyes, add +1.00D spherical lens to check once. At this time, the examinee sees the amount of near horizontal phoria.
NO.4 and record the value as P2. During the measurement process, let the subject keep his eyes on the mark clearly.
NO.5 P1-P2 is the gradient AC/A, the normal value is 3~6Δ/D
Post time: Aug-17-2023