ABSTRACT
Recently a new principle was discovered for detecting stereopsis by fusing two images with different luminance located in front-rear plane (NTT, Japan). We studied the effectiveness of the stereotest using this principle (Depth-fused 3D: DFD) in eyes with simulated amblyopia. Translucent occluders with different opacity were used to decrease the visual acuity of the dominant eye for detecting the threshold visual acuity to perceive stereopsis (TVA). Fifteen normal volunteers were tested for their TVA using DED, Titmus fly test (Fly), and Lang Stereotest (Lang). The median value of TVA was 0.08 by DFD, which was significantly lower than by Fly (0.3) or Lang (0.2) (One Way Anova on Ranks, p<0.05). In simulated amblyopia, stereopsis was detected with lower visual acuity when tested with a newly developed stereotest using depth fused 3D. Further study is necessary for patients with amblyopia or strabismus to evaluate the effectiveness of this stereotest.
