FRACTION OF HYALURONIC ACID OR ITS SALT, METHOD OF PURIFICATION OF THIS FRACTION, METHODS OF PREPARING THIS FRACTION, PHARMACEUTICAL PREPARATION AND AGENTS USED IN OPHTHALMOLOGY Russian patent published in 1999 - IPC

FIELD: medicine, ophthalmology, biochemistry, pharmacy. SUBSTANCE: highly purified hyaluronic acid fraction or its salt (an average molecular mass is 750000-123000 Da) has protein (0.2% as measured for albumin, not above), exhibits an ultraviolet absorption at 257 nm and 280 nm 1.0 A.U., not above, measured in 1% (weight/vol.) an aqueous solution and other properties (see point 1 of the invention claim). Fraction shows high effectiveness in operation of cataract removal and implantation of intraocular lens. EFFECT: improved method of preparing, enhanced effectiveness of fraction preparing. 26 cl, 8 tbl, 7 ex