The purpose of the inner layer or the endothelium of the cornea is to pump the fluid out of the cornea and keep it clear. When the endothelial cells stop working, the cornea swells; this is called corneal edema. The endothelial cells can be...
A corneal ulcer is a sore on the cornea of the eye. The cornea is the clear covering of your eye, referred to as a "window" by the Mayo Clinic. Corneal ulcers are also called keratitis, and can stem from eye injuries such as scratches, bacterial...
The top layer of tissue that covers the surface of your eye and helps focus light through your pupil is called the cornea. The buildup of excess fluid within the cornea can cause a condition called corneal dystrophy. Corneal dystrophy is a medical...
The cornea is the clear outer dome that covers the front of your eye. An injury or infection to the cornea may result in an open wound or erosion of an area on this sensitive tissue, a condition known as a corneal ulcer. Contact lens wearers have...
The cornea is the first line of defense against injury to the eye. The dome-shaped, clear tissue of the cornea covers the iris, the colored part of the eye, and the pupil, the hole that adjusts to let light into the eye. Diseases that damage the...
Corneal edema is swelling resulting from damage to the interior lining of the cornea. This damage can occur from trauma, eye surgery, overuse of contact lenses, toxins, glaucoma or endothelial disorders. Corneal swelling can result in a number of...
The cornea is a clear dome that protects the surface of the eye. Damage to the cornea can seriously affect vision. In severe cases, damage to the cornea is so severe that corneal transplant becomes necessary. Some, but not all, of the disease...
Fuchs' corneal dystrophy occurs when the innermost layer of cells in the cornea fails for no obvious reason. This layer of cells is responsible for removing the water out of the cornea; when there is excess water in the cornea, the cornea swells...
Lasik, or laser-assisted in situ keratomileusis, is the most common type of refractive surgery, and vision-threatening complications are rare, according to the All About Vision website. In this procedure, the eye surgeon creates a flap of cornea,...
LASIK stands for laser-assisted in situ keratomileusis, a common vision correction procedure. During this type of refractive surgery, a flap is created in the cornea, the laser is used to remove tissue from the cornea and the flap is rolled back...
The tissue that covers the front of your eye, called the cornea, has a dome shape that not only helps protect your eye but also directs light to the back of your eye. If you have damage to the cornea from an injury, infection or other condition,...
The cornea is the clear outer layer that protects the front of the eye. Corneal ulcers, also known as keratitis, usually affect one eye at a time. This condition happens when bacteria or parasites enter the eye through the body, causing...
Corneal ulcers, sometimes referred to as keratitis, affect the cornea, the outer dome that covers the front of your eye. This often occurs from an infection in the cornea or from a scratch or other injury that causes an open wound in the corneal...
The cornea is your eye’s outer layer. It’s a smooth, clear film composed of cells and proteins that helps you focus, and protects your eyes from dust and germs. Your cornea can recuperate from infections and light scratches, but if the...
The cornea is the transparent covering of the eye's surface. Light enters the eye through the cornea and is focused for clear vision. Sometimes the cornea prevents clear vision because it's damaged or distorted. That's when replacement of the...
The clear tissue at the front of the eye is the cornea; in order to have clear vision, the tissue of the cornea needs to remain thin and transparent. The inner layer of the cornea called the endothelium keeps the cornea clear, and if there is a...
Laser-in-situ-keratomileusis or LASIK surgery cuts a flap into the surface of the cornea and removes some of the underlying corneal bed tissue, which adjusts the shape of the lens. The corneal flap is dropped back into place and the newly...
High cholesterol, which is also known as dyslipidemia or hypercholesterolemia, can be caused by genetics and lifestyle factors. Excess blood cholesterol is a serious health risk for heart disease, stroke and damage to the blood vessels and organs....
Light eye sensitivity, also known as photophobia, is a condition in which the eyes become extremely uncomfortable to the presence of light. MedlinePlus says light sensitivity is common and may be a sign of certain underlying medical conditions....
An eye, or corneal, ulcer is an area of infection or inflammation in the cornea. These can be caused by bacteria, viruses, parasitic organisms, fungi or the organism Acanthamoeba. Eye ulcers present with pain, eye redness and decreased vision. If...
Ulcers on the eye typically appear on the cornea, the clear window that lets light into the back of the eye. Corneal ulcers often result from infections, severe dry eye, a foreign body or other inflammatory disorders, says the U.S. National...
Though used for cosmetic purposes to change your eye color, colored contact lenses are still considered medical devices. Federal law prohibits sellers from providing you with any type of contacts, even colored lenses, without a valid prescription....
Contact lenses are thin, curved plastic disks that are placed over the cornea, or the outer layer of the eye, for vision correction. According to the University of Michigan Kellogg Eye Center, there are 24 million people in the United States alone...
Astigmatism causes blurry vision that an eye doctor can correct with the proper eyeglass prescription. During an examination, the doctor will have the patient look through a phoropter, a flat machine that sits against the patients face. The doctor...
The cornea makes up the front window of the eye, and helps focus light for good, clear vision. The cornea also has the responsibility of protecting the eye from outside particles. All five layers of the cornea receive nutrients from the tear film...
Ocular herpes, a viral infection caused by the herpes simplex virus, is the most common cause of infectious corneal blindness in the United States, the National Eye Institute reports. Around 400,000 people have had at least one case of ocular...
A genetic disorder, Fuchs' dystrophy affects the cornea, which covers the iris in the eye. MedlinePlus notes that Fuchs' dystrophy usually affects both eyes. Patients with Fuchs' dystrophy have eye pain, vision that gets worse during the day,...
Split-second blink reflexes and the innate human capability to dodge potential injury typically provide a high level of protection for the eyes. Yet, these sensitive structures remain vulnerable to accidental and traumatic injury. Eye damage...
The dome-shaped cornea covers your eye. The space between the cornea and your iris contains fluid called aqueous humor that nourishes the surrounding tissues. If you have thin corneas, you may have an increased risk for corneal damage or...
Pink eye (conjunctivitis) is an inflammation or infection of the transparent membranes (conjunctiva) that line your eyelid and part of your eyeball. The cause of pink eye is commonly a bacterial or viral infection, an allergic reaction or, in...