I have astigmatism in my left eye, does that mean I'll always have to wear glasses?

My eyes keep having flashes and dots when there's light, what could it be?

I started to use permanent glasses last year, after the age 35. I never needed them before because doctors said that I had impeccable eye sight and probably it will continue to be like that until around the age of 45 but it didn't. I think it's hereditary because my father has astigmatism too. Even when I use eyeglasses sometimes I lose the clarity of my vision, it becomes hard to see even tv. I wonder if there is a natural remedy or supplements to make my eyes stronger and healthier. I always thought nothing can help this kind of thing but when you have a problem, it makes you search for a solution even if you believe there isn't any.