Dr. David Hongwei Ren MD, PHD

LASIK, or laser in situ keratomileusis, is a very popular surgical procedure to correct and improve vision, and reduces an individual's dependence on contact lenses and glasses. It is a very common refractive surgical procedure to correct different types of vision issues, including nearsightedness,...

What is conjunctivitis?Conjunctivitis, also commonly called as “pink eye”, is an eye infection caused by either bacteria or viruses. You can also develop a "pink eye" if you are exposed to certain allergens that can irritate your eyes. When you have a pink eye, the conjunctiva of your eye is...

What is Conjunctivitis?Conjunctivitis is an inflammation of the conjunctiva (a transparent membrane that covers the white part of the eyeball and lines the eyelids). Conjunctivitis is also known as pink eye, due to the characteristic pink or reddish color of the whites of the eyes.What Causes...

When the eye lens changes with age, cataracts develop and your vision becomes blurry. A clear structure, the lens is located at the back of the pupil. Light streams in via the cornea and the lens directs it to the retina when it enters the eye.When you start to age, cataracts can begin developing,...

Conjunctivitis or "pinkeye" is an infection of the conjunctiva, the thin, clear membrane coating the white of the eye and lining the inside of the eyelid. The symptoms may vary slightly depending on the cause, but are distinct: redness of the white part of the eye, tearing, a thick yellow discharge...

The exact cause of cataracts is not known. Nevertheless, it seems that most cataracts are caused by long-term variations in the eye lens protein components which in turn causes cloudiness in the lens. Though not common, cataracts can affect infants and young children due to genetic enzyme...