Ophthalmic composition
Disclosed is an ophthalmic composition containing (A) not less than 50,000 units/100 mL of vitamin A, (B) not less than 0.4 W/V % of a polyoxyethylene polyoxypropylene glycol, and (C) trometamol.
1. An ophthalmic composition comprising
(A) 50,000 to 500,000 units/100 mL of vitamin A,
(B) 0.4 to 5 W/V % of polyoxyethylene polyoxypropylene glycol, and
(C) trometamol,
wherein a ratio being expressed as [(A) vitamin A units/100 mL]/[(B) polyoxyethylene polyoxypropylene glycol g/100 mL] is 10,000 to 150,000.
2. The ophthalmic composition as defined in claim 1 , wherein a content of the ingredient (A) is at least 100,000 units/100 mL.
3. The ophthalmic composition as defined in claim 1 , wherein a content of the ingredient (A) is at least 200,000 units/100 mL.
4. The ophthalmic composition as defined in claim 1 , wherein a content of the ingredient (A) is at least 300,000 units/100 mL.
5. The ophthalmic composition as defined in any one of claims 1 to 4 , further comprising (D) an antioxidant.
6. The ophthalmic composition as defined in claim 5 , wherein the ingredient (D) is vitamin E and/or dibutylhydroxytoluene.
7. The ophthalmic composition as recited in claim 1 , wherein the ingredient (A) is retinol palmitate, retinol acetate or retinoic acid.
8. The ophthalmic composition as defined in claim 1 , wherein a ratio by weight between the ingredient (B) and the ingredient (C) expressed as (B):(C) is at 1:30 to 30:1.
9. The ophthalmic composition as defined in claim 1 , wherein a ratio by weight between the ingredient (B) and the ingredient (C), the weight ratio being expressed as (B):(C), is at 1:5 to 20:1.
10. The ophthalmic composition as recited in claim 1 , wherein the polyoxyethylene in the polyoxyethylene polyoxypropylene glycol ingredient (B) has an average degree of polymerization of ethylene oxide of 20 to 200 and wherein the polyoxypropylene in the polyoxyethylene polyoxypropylene glycol ingredient (B) has an average degree of polymerization of propylene oxide of 20 to 70.
11. The ophthalmic composition as defined in claim 1 , wherein a content of trometamol ingredient (C) is 0.1 to 3 W/V % relative to the total amount of the ophthalmic composition.
12. The ophthalmic composition as defined in claim 1 , further comprising as an antioxidant ingredient (D) d-α-tocopherol.
13. The ophthalmic composition as defined in claim 1 , further comprising as an antioxidant ingredient (D) a combination of vitamin E and dibutylhydroxytoluene.
14. The ophthalmic composition as defined in claim 1 , which is obtained by solubilizing (A) vitamin A in sterilized purified water with the aid of (B) polyoxyethylene polyoxypropylene glycol, followed by adding (C) trometamol.