Blindness is the inability to see anything, even light. If you are partially blind, you have limited vision. Complete blindness means that you cannot see at all and are in total darkness. Legal blindness refers to vision that is highly compromise
Hazy vision, cloudy vision, blurred vision are all problems with seeing clearly. Any change in your normal vision is cause for concern and is a good reason to call a doctor for an examination.
Night blindness (nyctalopia) is a type of vision impairment. People with night blindness experience poor vision at night or in dimly lit environments. Although the term "night blindness" implies that you cannot see at night, this is not the case.