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Lauren Sauvan, Natacha Stolowy, Danièle Denis, Frédéric Matonti, Frédéric Chavane, Robert Hess, Alexandre Reynaud; Contribution of monocular patching of the amblyopic eye prior to dichoptic movie viewing for the treatment of amblyopia beyond the critical period. Invest. Ophthalmol. Vis. Sci. 2019;60(9):217. doi: https://doi.org/.
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Dichoptic movie viewing significantly improves visual acuity in amblyopia in children. Furthermore, short-term occlusion of the amblyopic eye transiently increases its contribution to binocular fusion. In this study, we first asked whether dichoptic movie viewing could improve the visual function of amblyopic subjects beyond the critical period. Then, we tested if this effect could be enhanced by short-term monocular pathing of the amblyopic eye.
17 subjects presenting fixed functional amblyopia participated in this study. They followed 6 training sessions of 1.5 hour of dichoptic movie viewing. Seven of them had to wear an occluding patch over the amblyopic eye for two hours prior to each of these sessions. Best-corrected visual acuity, monocular contrast sensitivity, interocular balance and stereoacuity were measured before and after the training.
For the non-patched group, mean amblyopic eye visual acuity significantly improved from 0.54 to 0.46 logMAR(p<0.05). For the patched group, mean amblyopic eye visual acuity significantly improved from 0.62 to 0.43 logMAR(p<0.05). Improvements were also observed for the other visual functions tested, however they were not significant.
Our training method shows promising results and could be used as a treatment of fixed amblyopia in adults. These results were obtained in only six sessions over a 2-week period of training and they encourage us to push on for further investigations.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.
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