Dr. Alan Y Chow M.D.

Eye twitching is the repetitive, involuntary blinking or spasm of the upper eyelid. Also known as blepharospasm, twitching affects the muscles of both eyes. Some of the most common causes of eye twitching include fatigue, stress, and caffeine. Twitching is usually painless and goes away on its own...

Normally, the eye, cornea, and lens can easily focus light rays on the retina. The disease known asastigmatism is an imperfection in the curvature of the cornea, and it can produce a clear, round dome covering the iris and pupil.The cornea and lens remain smooth and are always curved equally in all...

Lasik eye surgery is a surgical procedure which corrects deteriorating vision by reshaping the surface of the eye, more precisely the corneal layer in such a manner that light enters the eye at the angle appropriate for correct vision. Nearsightedness (myopia), farsightedness (hyperopia) and...

Blepharoplasty, or eyelid surgery as it's commonly known, is performed to correct droopy upper and/or lower eyelids and under-eye bags. The surgery may be performed for functional or medical reasons. Functional blepharoplasty corrects problems related to upper eyelids that sag or droop enough to...

Diabetic retinopathy is a long-term complication of diabetes that affects the eyes. The World Health Organization (WHO) estimates that diabetic retinopathy is responsible for 4 percent of the 45 million cases of blindness throughout the world. It is caused by a damage to the blood vessels of the...

When the eye’s natural lenses are removed during cataract surgery, they are replaced by artificial lenses known as intraocular lenses (IOLs). They are also used to correct a patient’s vision during a surgical procedure known as refractive lens exchange.Intraocular lenses are FDA-approved and...