Also, I should mention that you don't have to have 6/6 vision naturally to fly - I'm not sure about the Class 1 standards in Bahrain, but here in the UK you can be between +5 and -6 for the initial medical, providing you are corrected to 6/6 with both eyes together and 6/9 in each eye seperately.
After the initial medical there are no further limits, so you can have any error of refraction, and providing you can be corrected to the standards above you will pass the visual section of the medical.