Figure 5.

Grating acuity and vernier acuity at 6–9 years of age for 20 amblyopic children enrolled in a prospective study at the time of diagnosis during infancy.(Birch and Swanson, 2000) The solid line shows the predicted relationship if comparable deficits were present for both vernier and grating acuity so that the normal grating:vernier acuity ratio of 8:1 was maintained. Data from amblyopic children with infantile anisometropia fall near the prediction line. Data from amblyopic children with infantile esotropia fall above the prediction line, i.e., there is a disproportionally larger loss in vernier acuity.