Dr. Joseph T Fan 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...

Contact lenses are popular for its two most important characteristics: flexibility and convenience. Based on their usage, contact lenses are categorized into two types: vision correcting lenses, and decorative lenses. Decorative lenses are used to improve the look of the eyes. Generally, these...

Lasik or laser-assisted in-situ keratomileusis employs a laser beam to correct nearsightedness, farsightedness and astigmatism. These are refractive errors that result from distortions in the curvature of the cornea of the eye. Lasik selectively peels away layers of stromal cells that constitute the...

Eye floaters are small, moving specks on the eyeball that often occur in one's field of vision. These grey or black dots, become more prominent while looking at a bright object. If the floaters are large they may shadow vision, but in most cases, eye floaters are harmless. People often neglect or...

IntroductionTay-Sachs disease is a genetic disorder that affects the brain's nerve cells. Individuals who have this disorder lacks a type of protein that is needed to break down fatty substances in the brain. Without this protein, fatty substances accumulate in the brain to toxic levels, which...

What is Chalazion?A chalazion is a benign and painless nodule which can occur in the upper or lower eyelid. It is common and is sometimes called a meibomian cyst or a tarsal cyst. The term chalazion (pronounced kah-la'-ze-on) originates from the Greek word which means a small lump. These nodules...