COMPOSITION IN THE FORM OF LIQUID FOR MAINTENANANCE OF CONTACT LENSES AND MEDICAL MATERIALS

The invention relates to a composition, particularly in the form of liquid to be used externally as a rinsing contact lenses, containing nanocrystalline photocatalyst active in visible light, and optionally hydrogen peroxide. 2. The composition according to claim 1 , which is a colloidal solution having surface-modified titanium dioxide nanoparticles smaller than 100 nm as a dispersed phase claim 1 , and the solution of hydrogen peroxide as the dispersing medium.3. The composition according to claim 1 , characterized in that it shows visible light absorption in the wavelength range (λ) of not less than approximately 400 nm to about 600 nm claim 1 , preferably up to about 700 nm claim 1 , and ultraviolet light absorption (λ<400 nm).4. The composition according to claim 1 , wherein the organic compound is a compound selected from the group consisting of: phthalic acid claim 1 , 4-sulfophthalic acid claim 1 , 4-amino-2-hydroxybenzoic acid claim 1 , 3-hydroxy-2-naphthylic acid claim 1 , salicylic acid claim 1 , 6-hydroxysalicylic acid claim 1 , 5-hydroxysalicylic acid claim 1 , 5-sulfosalicylic acid claim 1 , 3 claim 1 ,5-dinitrosalicylic acid claim 1 , disodium salt of 1 claim 1 ,4-dihydroxy-1 claim 1 ,3-benzenedisulfonic acid claim 1 , gallic acid claim 1 , pyrogallol claim 1 , 2 claim 1 ,3-naphthalenediol claim 1 , 4-methylcatechol claim 1 , 3 claim 1 ,5-di-tert-butylcatechol claim 1 , p-nitrocatechol claim 1 , 3 claim 1 ,4-dihydroxy-L-phenylalanine (DOPA) claim 1 , rutin and ascorbic acid.5. The composition according to claim 2 , characterized in that it exhibits stability in aqueous solution with a pH of about 7 claim 2 , and wherein the organic compound is a compound selected from the group consisting of: disodium salt of 4 claim 2 ,5-dihydroxybenzene-1 claim 2 ,3-disulfonic acid claim 2 , rutin and ascorbic acid.6. The composition according to claim 1 , further comprising a buffer system claim 1 , preferably isotonic claim 1 , to maintain the pH in a ...