I learned that sight is our eyes (receptors within the eye) picking up light being reflected giving us the X, Y, and Z - axis co-ordinates of the objects reflecting the light, this stimulates a part of our brain which then makes an image out of the information (colour aswell). If you are encapable of determining locations of objects in this fashion you'll see things very differently like for instance seeing things farther away literally shrink or see thinks in a 2-D fashion instead of 3-D.
If you were blind from the beginning (your brain has matured) or gone a long period of time before the parts of your brain responsible for sight could develop (or they degenerated if over that period of time) in those areas then if you acquire sight then you'll:
A) be encapable of seeing still objects, but can still perceive moving objects clearly.
B) have to learn everything again because your hand-eye coordination, depth perception, ability to recognise and respond via sight is the equivalent of a baby's (if not worse). And again everything will be a 2-D plain and really really horrible vision (if it isn't moving it's extremely blurred).
C) encapable of recognising faces, expressions, or well anything involving visual cues.
and lastly D) cope with it i.e. shutting your eyes, or damaging your eyes to make yourself blind again (in other words going back to being blind), delve into a state of confusion and depression, and if not that then kill yourself.
Also that if you train yourself to determine everything with sound cues (location, height of object, distance, etc.) then you can literally see sound because the parts of the brain responsible for determining those things for sight is interconnected with sound and would thus after enough stimulation make a colourless picture (think sonar, atleast one person has managed to do it).
All in all, I learned that I should never tell a blind person to aquire sight if they've gone a long long time without it. Becuase they'd probably go into a depression, commit suicide, or just go back to being blind.
A tool is a tool regardless. I mean if you suck, you suck, and not even the most perfect tool could save you. And if your damn good then even with the worst tool ever conceived you could chug out some high quality shit.