Near and distance stereopsis restoration in amblyopia with S3D computer treatment

Abstract:

AIM: To evaluate the effect of stereoscopic 3D(S3D)technology as a visual training system in children with amblyopia.

METHODS: Totally 30 children, aged 4-16 years old, 18 with ametropic amblyopia(AMA), and 12 with anisometropic amblyopia(ANA)were recruited in this study. A binocular 3D shutter glasses technology visual training system was used for training trials. Each training time lasted 1h, and the number of training trials totaled 33(mean±SD: 32±8)times on average, per-person. Before and after each training trial, the best corrected visual acuity(BCVA)of each eye, range of fusion by synoptophore, as well as near and distance stereopsis acuity by Yan Shaoming random-dot test and synoptophore respectively was measured.

RESULTS: A significant difference was found pre- and post treatment in BCVA in both kinds of amblyopia studied. Significant improvement was also found in fusion range and stereopsis acuity. The improvement of fusion range and stereopsis recovery could be seen in ANA than in AMA patients. The near stereopsis acuity recovery in ANA group might more easily to regain stereoacuity at near than in AMA group.

CONCLUSION: S3D display vision training systems are indicated for the recovery of stereoacuity in children with amblyopia.

Key words:stereopsis; amblyopia; fusion; ametropic amblyopia; anisometropic amblyopia