Ophtamo said there's nothing wrong with my eyes he did every test possible blood sugar, optic nerve etc but i still can't see much detail like before?

Well- check brain: If you are complaining of lack of well defined vision or there is something else odd about your vision that you can explain and the ophthalmologist gave you the thumbs up as far as the eyeball and its contents are concerned including the head of the optic nerve then, I believe someone will be sending you to see a neurologist very soon where they will look at the brain. Do you have headaches?