I have a very weak eyesight that is -7.5. Doctors told me it's by birth and wll keep getting weaker till I am alive. I don't know how much weak it is in 6/6 or 6/24 terminology. But my eyesight is 6/6 with glasses on. Can anyone please help me out with that will my eyesight be an issue for medical exam or will it be ok and I don't need to worry? Thankyou for the help in advance.