When i was a teenager (many years ago ) my eyesight started to deteriorate and I was wondering whether I would be able to become a professional pilot. I went to an ophthalmologist and wrote to the relevant aviation authority asking if my results would stop me getting a commercial license. They wrote back to tell me that they would make an assessment when I applied for my commercial license! I could have given up then and there feeling let down by my genetics, but I decided to keep going until someone said no. Long story short, I finished my career with 23,000 hours.