Eye Conditions

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Chalazion
Inflamed lump in a meibomian gland (in the eyelid). Inflammation usually subsides, but may need surgical removal. Sometimes called an internal hordeolum.

Chemical Burn
A chemical burn occurs when living tissue is exposed to an extremely reactive chemical substance such as a strong acid or base. Chemical burns need no source of heat, can occur immediately on contact, and are extremely painful. The exact symptoms of a chemical burn depend on the chemical involved.

Choroidal Neovascular Membrane (CNVM)
A CNVM is ultimately the result of a break in a structural layer beneath the retina known as Bruch's membrane, which separates the nourishing vascular layer called the choroid from the retina.

Choroidal Nevus
Rare tumors that can grow into a malignant melanoma. Like a raised freckle on the skin, nevi can occur inside the eye and should be seen by an eye doctor.

Cogan's Dystrophy
Cogan's Dystrophy is a disorder of the eyes, specifically a type of corneal dystrophy. It is also called epithelial basement membrane dystrophy, Cogan's microcystic epithelial dystrophy, map-dot-fingerprint dystrophy or dystrophic recurrent erosion. Cogan's Dystrophy affects the epithelial layer of the cornea in both eyes. The cells lose their attachments to the underlying Bowman's membrane and tend to tear away from the rest of the cornea causing pain, blurred vision and a red eye.

Color Blindness
Color blindness, or color vision deficiency, in humans is the inability to perceive differences between some or all colors that other people can distinguish. It is most often of genetic nature, but may also occur because of eye, nerve, or brain damage, or due to exposure to certain chemicals.

Computer Vision Syndrome (CVS)
Computer vision syndrome (CVS) is a condition resulting from focusing the eyes on a computer display for protacted, uninterrupted periods of time. The symptoms of CVS include headaches, blurred vision, neck pain, fatigue, eye strain, and difficulty refocusing the eyes.

Conjunctivitis
Inflammation of the conjunctiva, characterized by a pink eye. The cause is either infectious or allergic; the term "pink eye" really refers to the viral variety, but is commonly used for any type of conjunctivitis. Other symptoms include burning, discharge, dryness, itching, light sensitivity, eye pain or discomfort, stickiness, tearing and chemosis.

Cornea
Referred to as the "window of the eye." It provides most of the focusing power when light enters the eye. The cornea is composed of five layers of tissue. The outer layer (the epithelium) is the eye's protective layer. This layer is made up of highly regenerative cells that have the ability to grow back within three days. You generate a completely new epithelial layer every five days. This allows for fast healing of superficial injuries to the cornea. Most of the inner layers provide strength to the eye.

Corneal Dystrophy
One of a group of conditions, usually hereditary, in which the cornea loses its transparency. The corneal surface is no longer smooth. Common forms include map-dot-fingerprint dystrophy, Fuch's dystrophy and lattice dystrophy. Symptoms include blurred vision, foreign body sensation, light sensitivity, eye pain or discomfort and vision loss.