I can imagine the concern you feel! I've had floaters, but not flashes, etc.
I learned interesting eye info. from an iridologist, who specializes in eyes, but more about what they show about the whole body. She did have some ideas for cataracts, etc, though. A health food store might be able to direct you to one if you'd like a consult.
Also, MSM (methyl sulfonyl methane) supplement has done alot for me in terms of restoring youthful elasticity & providing repair to scars, etc. It should be available in our diet, but we are often lacking in tree & vine ripened raw fruits & veggies, so is good to supplement.