Operating on a person's eyes takes a lot of nerve!
This very realistic game lets you see exactly what happens when you change the shape of somebodies eye so that they can see more clearly.
You need to make the procedure as pain free as possible and it is important to cut the cornea with the laser in just the right way.
A great game if you know anyone with bad eye sight.
The Egyptians. over 2 thousand years ago, performed eye surgery to remove cataracts.
A cataract is a clouding of the lens in the eye that focuses the light. It is easy to treat nowadays.
Using a laser to re-shape the eye is a very new technique that you can read about in detail here: wiki/LASIK
Lasik eye surgery is controversial because, although it has many benefits for people with very bad eyesight, it does cause some problems. Some people have 'dry eyes'- they cannot make tears. Sometimes people see halos of fuzzy light around things.
The truth is every operation has a downside as well as an upside and people need to think carefully before every procedure.