Color blindness occurs when you are unable to see colors in a normal way. Color blindness often happens when someone cannot distinguish between certain colors. This usually happens between greens and reds, and occasionally blues. Color blindness can happen when one or more of the color cone cells are

Many people have both cataracts and glaucoma at the same time. In some cases, people have cataracts that affect their daily activities, and their eye pressure has not been controlled successfully with glaucoma medicine or laser treatment. For some of these people, ophthalmologists may suggest doing a

Conjunctivitis (often called "pink eye") is when the clear tissue covering the white part of your eye and the inside of your eyelids gets red, swollen and sticky. It can spread easily among people when caused by a virus or bacteria. Sometimes pink eye is due to an allergic reaction. In some cases, an

Millions of people choose to wear contact lenses, rather than eyeglasses, to correct vision problems. There are many different types of lenses available to help correct refractive errors. It is important to remember that contacts are not fashion accessories or cosmetics. They are medical devices that

Contact lenses are used to correct vision without glasses. If contact lenses are not cared for properly, you risk getting an eye infection. Symptoms of contact-lens related infections include blurry vision, eye redness and light sensitivity. If you have any of these symptoms, call your ophthalmologist. If

A corneal abrasion is a scratch, scrape or cut on the surface of your cornea. Corneal erosion is when the top layer of cells on your cornea (epithelium) loosens from the layer under it. Sometimes a corneal abrasion can lead to corneal erosion. Both conditions are painful and make your vision blurry or

The normally round cornea bulges outward in people with keratoconus or with a condition called ectasia after refractive surgery. A treatment called corneal cross-linking may help. Corneal cross-linking uses eye drops and UV light to strengthen the cornea’s collagen fibers. It usually stops the cornea

Corneal dystrophies are rare diseases that run in families and progress slowly over many years. With corneal dystrophies, abnormal material builds up in the cornea. This can cause blurred vision or even loss of vision. Corneal dystrophies may be treated with eye drops, ointments or special contact lenses.

Presbyopia is an age-related eye condition, which gradually weakens the eye’s ability to focus at near, making reading and other near-focused tasks difficult. Common treatments for presbyopia include eyeglasses, contact lenses or laser vision corrective surgery. A newer way to treat presbyopia is with

A corneal laceration is a cut on the cornea. They are usually caused by something sharp flying into the eye. A corneal laceration needs to be treated right away to avoid vision loss. Surgery is usually needed to prevent further damage to the eye and to remove any foreign objects from the eye. After surgery,

Corneal transplant is surgery that replaces a damaged or diseased cornea with a healthy donor cornea. There are different types of corneal transplants. In some cases, only some layers of the cornea are replaced with new tissue. Sometimes, the entire cornea must be replaced. Recovering clear vision may

A corneal ulcer is an open sore on the cornea. It usually results from an eye infection. See your ophthalmologist immediately if you think you have a corneal ulcer. They can permanently damage your vision and even cause blindness if they are not treated. Eye drops are usually the treatment of choice.

Cystoid macular edema (CME) is where tiny, fluid-filled sacs called cysts develop in your macula. It affects your central vision. It may be treated with eye drop medicines, medication injections, laser surgery, or other surgery. If you have any questions about your eyes or your vision, speak with your

Cytomegalovirus retinitis (CMV retinitis) is a serious viral eye infection of the retina. It is most often found in people with weakened immune systems. The earliest symptoms are floaters with a shadow appearing in your side vision as the disease worsens. Ophthalmologists need to check people with compromised

A detached retina is when your retina lifts away from the back of the eye. You may see flashing lights or many new floaters. Or you may see a shadow in your side vision. Also, a gray curtain might cover part of your field of vision. If you have any of these signs, call an ophthalmologist right away. Surgery

High blood sugar levels can affect your retina and macula, leading to vision loss. This is called diabetic retinopathy. In its early stages, diabetic retinopathy often has no symptoms. But as it gets worse, eye damage from diabetes leads to vision loss. Treatment for diabetic retinopathy may include