I Feel That My Long Sight In One Eye Is

i feel that my long sight in one eye is decresing i feel less clarity while looking with my right eye to distant objects . i use mobile amd computer everyday for more thn 2hrs??
i can read everything but i feel a lose in clarity when looking with only right eye? please help?? im freaked out?i went to a doctor they said everything is normal my vision is 6/6