Some get white and chalky due to calcium deposition or vitamin deficiency. Surgery is not usually required, unless it becomes unsightly. Wearing sunglasses diminishes the yellowing. Prescribed eye drops may be required for continued redness and irritation. Myopia or nearsightedness occurs when light rays focus in front of the retina, causing objects seen at a distance to be indistinct.
Treatment is with glasses, contact lenses or surgically with Lasik treatment.
Hyperopia or farsightedness occurs when light rays focus behind the retina, causing close objects to be indistinct. Treatment is with glasses, contact lenses or , depending on the degree, with Lasik treatment. It is an irregular curvature of the cornea or lens, or both. This results in a distorted image because light cannot focus on a single point on the retina. This condition can affect vision at all distances and may be associated with either myopia or hyperopia.