Find ways for fast relief from psoriasis and other sensitive skin conditions with these easy, no-fuss remedies.
This animation by Visible productions explains the process by which we see and how imperfections in the cornea result in nearsightedness, farsightedness and astigmatism. It also shows how lasik surgery is performed to correct these conditions.
To view an animation that explains how aging affects our vision, click here.
To learn what causes cataracts, and how they are normally treated, click here.