Talk to an AME about getting a SODA or a Waiver....if you can see 20/25, it may be good enough for the FAA if you can demonstrate your vision is adequate......if you are a member of AOPA, call them and see what they say. Back before the rules changed (about 10 years ago), the requirements were for less than 20/400 uncorrected. I had 20/600. I was able to get a waiver for the vision requirement and had a 1st class medical in my hands shortly after that...........