Dr. John J Khadem M.D., M.P.H.

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,...

What is a cataract?Sometimes there is a clouding of the lens in the eye; this clouding is called a cataract. Mostly, this clouding is related to old age. In fact, the majority of Americans aged 80 and above have experienced this clouding or have already undergone a cataract surgery at a particular...

Cataracts can be present at birth – which is termed as congenital, and in other cases can develop later in life. Various studies have shown an estimation that one out of every 250 children will develop a cataract either prior to birth or during childhood. While the exact cause is unknown,...

Lasik (laser-assisted in situ keratomileusis), commonly referred to as laser eye surgery or laser vision correction, is a revolutionary new technology that corrects distortion in vision using focused laser beams to remove corneal tissue. The reconstruction of the surface of the cornea enables it...

Herpes Simplex Virus 1 (HSV-1)HSV-1 or herpes simplex virus type 1 is a type of herpes simplex virus that causes cold sores. It is called "oral herpes" because it often causes sores around the mouth or on the lips. Cold sores are also called as fever blisters. However, the sores can also be found...

Parkinson’s disease is a chronic, progressive movement disorder that affects the nervous system. It is characterized by gradual death and breakdown of nerve cells in the brain resulting in the decreased production of a chemical messenger called dopamine. Reduced dopamine levels cause abnormal...