I have a lazy right eye which stopped growing at the age of 5. It got diagonised when I'm 12 years old. My doctor asked me to use spectacles for which my left eye has zero power and right eye has very high power around +5. I couldn't see as my right eye vision gets overlapping with left eye. Around a year before my right eye also got sight +0.5. I am having frequent headaches & gets easily tired if I study or focus.Suddenly my vision gets black and stays like that for a few moments.