For citations:
Filatov I.A., Shemetov S.A., Mohammad E.M. Elimination of upper eyelid retraction using a polytetrafluoroethylene implant. Russian Ophthalmological Journal. 2020;13(3):36-41. (In Russ.) https://doi.org/10.21516/2072-0076-2020-13-3-36-41