antiophthalmic factor
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| Noun | 1. |  antiophthalmic factor - any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyesfat-soluble vitamin - any vitamin that is soluble in fats retinol, vitamin A1 - an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene dehydroretinol, vitamin A2 - a viscous alcohol that is less active in mammals than is vitamin A1 |