Anaglyphic 3-dimensional movies, a simple binocular method to treat anisometropic or strabismic amblyopia in adults
Arash Mir Mohammad Sadeghi1 *, Motahhareh Sadeghi2 , Mohammad Reza Akbari2
- Eye research center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Abstract: To evaluate the efficacy of anaglyphic 3-dimensional movies to treat adults with anisometropic or strabismic amblyopia.
Methods: The participants put on a trial frame containing subjective refraction, fogging plus lenses for the dominant eye, and anaglyphic red-cyan plastic spectacles. They participated in 20 sessions of 1.5 hours anaglyphic 3-dimensional animated movie watching. Significant visual acuity (VA) improvement was defined as improvement ≥0.2 in logMAR values. Change in octaves of stereopsis was defined as halving the arcsec or 0.3 change in log arcsec.
Results: Nine cases with an average age of 29.2 ± 9.8 years completed the treatment course. The mean VA in amblyopic eye improved significantly from 0.38 ± 0.18 (0.15-0.7) logMAR to 0.22 ± 0.14 (0.1-0.5) logMAR after completion of sessions (p= 0.01). All participants except one responded to the treatment in terms of VA improvement. However, only 4 cases showed significant VA improvement. In all cases, the mean stereo acuity improved significantly from 2.4 ± 0.5 (1.6-2.9) log arcsec to 2.0 ± 0.5 (1.6-2.9) log arcsec (p=0.04). Two patients had pre-treatment 40 seconds of arc stereopsis that remained unchanged during follow-up. Of 7 cases with reduced stereopsis in the baseline examinations, 4 showed ?2 octaves improvements in stereopsis. The results were stable in 6 months follow-up.
Conclusion: The present study showed that a simple and readily available method of amblyopia treatment can be effective in some cases. The extent of improvement is comparable with other proposed binocular but complicated and highly equipped treatment methods.
