Contribution of Short-Time Occlusion of the Amblyopic Eye to a Passive Dichoptic Video Treatment for Amblyopia beyond the Critical Period

Figure 2

Test stimuli illustrations. (a) qCSF stimulus illustration. In a single-interval identification task, the subject had to judge the orientation (horizontal or vertical) of a filtered noise pattern of varying spatial frequency and contrast. (b) Dichoptic letter chart illustration. Five letters of 2 c/d were presented at various contrasts to the left eye and 5 different letters with complementary contrasts to the right eye at the same spatial locations. So when viewed with both eyes, letters appeared overlapping on screen. Adapted from Kwon et al. [61]; Birch et al. [62].

(a)

(b)