Patent ID: 6916824

Claim:
A method of treating cataracts, retinopathy, lens cell damage and retinal cell damage caused by diabetes comprising administering to a patient an effective amount of one or more compounds of the formula: wherein: T is independently CR, NR, NR, S or O; X is independently O, NR, N or S; Y is independently O, NR, N or S; Z is independently C, N, S or O; R 1 , R 3 , R 4 and R 5 are, independently, H, OH, alkyl, alkenyl, alkynyl, an aromatic ring system, amino, sulfhydryl, sulfonyl, wherein R is independently H, OH, alkyl, alkenyl, alkynyl, an aromatic ring system, amino, sulfhydryl, or sulfonyl, M is a divalent alkyl, alkenyl or alkynyl, aromatic ring system, or sulfonyl, W is Cl, F, Br or OCl, and A is an aromatic ring system; R 2 , R 8 and R 9 are independently H, OH, alkyl, alkenyl, alkynyl, an aromatic ring system, amino, sulfhydryl, or sulfonyl; and R 6 is independently R, NH 2 , OH, or OCOR where R is H, OH, alkyl, alkenyl, alkynyl, an aromatic ring system, amino, sulfhydryl, or sulfonyl; R 7 is independently OH or H; or R 6 and R 7 taken together are O; and pharmaceutically acceptable salts or esters of the foregoing, as well as optical isomers thereof.