I went for checkup of eyes cause I was facing problem in seeing clearly by my spectacles There doctor said my spectacles number has increased, He tried every possible combination of different lenses but I was not able to read the smallest line on board Then he gave me the lenses which were closest to clear vision but perfectly clear to me cause I am still not able to read the smallest characters He told me to cover each eye for two hours on every adjacently on each day I also face problem in vision at dark, also at night time Please tell me, what I am facing ?? He said the retina is not working actively but some exercises may male it active