Question

disease in which we can not see without spects

Answer 1

There are three types of conditions which affect eyesight

1) Myopia. ( Near sightedness)
2) Hypermetropia. ( Far Sightedness)
3) Presbyopia. ( A complicated case of both near and far sightedness, neads bifocals to be cured)

These three are different conditions, which need different types of spectacles
(lenses) to be cured.

Hope it helps
^_^