?????? ??????? ?? ????????? ??????? ??????????? ??????? (??????, Retina) ??? ????? ???? (?????, Lens) ????????? ?????????? ???????? ????? ?? ?????? ????? ??? ?????? ????????? ??? ?????????? ?????? ( ?????? : Vitreous humour ?? Vitreous humor ) ???? ?? ??% ????, ?????? ?? ???????? ????????? (viscosity) ????? ?????????? ?????? ??? ???? ???? ??? ????? ???? ?????? ??? ???, ????, ???????? (??????????) ? ??????? ????? ????????? ???????????? ????????????? (visual field) ???? ???????? ?????? ?????? ????? ????? ?????? ????????? ??? ??? ????? ??? ????? ???? ??? ????? ??? ??? ????? ???? ???????? ???? ???? ?????? ???? ???, ??? ???????? ??? ???? ???? ??????????? ????? ????, ?? ??????? ????