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eye

How much do we know about our eyes?

commonly seen eye diseases:

Dry Eye: Everyone will experience it at least once in their lifetime. There are many simple treatments available to improve your eye comfort. Dryness can be caused by variety of reasons, such as environment, hormones, seasonal changes, and many others. You need to have the right diagnosis to make your treatment effective.
Glaucoma: This is the number one overlooked disease by patients and doctors. Some may think high eye pressure is the only indicator for glaucoma, but the majority of glaucoma patients have low or normal eye pressure. In order to make an accurate diagnosis of glaucoma, doctors usually need several sets of eye exam data to catch the disease early. Patients usually experience no symptoms or visual changes during the early stages. Damages to the optic nerve can occur if glaucoma is not being monitored or treated.
Cataracts: A cataract is a cloudy area in the normally clear lens of the eye. Depending upon its size and location, it can interfere with normal vision. Most cataracts develop in people over age 55, but one may be worse than the other. When a cataract progresses to the point that it affects a person's ability to do normal everyday tasks, surgery may be needed.
Hordeolum (aka "stye eye"): This is usually a bump on your lid and may or may not cause you discomfort. Usually it does not go away by itself and can even lead to more severe infection of the lids.

Commonly seen vision problem:

Myopia: Myopia, or nearsightedness, manifests as a distant blur, while near vision remains relatively unaffected. It is caused by the eye focusing an image short of the retina at the back of the eye. There are three components that determine the eyes’ focusing behavior; the cornea, the lens, and the length of the eye. The cornea, the clear part of the eye on the front surface, bends 70-80% of the incoming light into the eye. Myopia occurs when the cornea is too steep. The lens, located inside the eye behind the cornea, is responsible for fine focusing the bends 20-30% of the incoming light. The eye length, from front to back, can also affect where the light focuses.
Hyperopia: Hyperopia is also known as "farsightedness." It usually means that one has better distant vision than near vision. In fact, the majority of the United States population is farsighted. Hyperopia tends to mostly affect the young under 10 years old and people age 45 and above. The condition is characterized by an eye that is too short in length, or where is the front of the corneal curvature is too flat.
Astigmatism: Astigmatism is a type of refractive error like Hyperopia and Myopia. Though astigmatism can occur by itself, it is most commonly found in combination with myopia or hyperopia. Astigmatism occurs when the cornea is irregular in shape. Astigmatic corneas are shaped like a tablespoon where normally the cornea is shaped like a soup spoon (oval versus spherical shape) or where one side is steeper in curvature than the other side. This creates two focal points for the eye.