Common Eye Conditions

Acanthamoeba Keratitis
A rare but serious eye infection associated with poor contact lens hygiene and other factors.

Amblyopia (Lazy Eye)
Amblyopia is a vision development problem in infants and young children that can lead to permanent vision loss. Learn the symptoms, causes and treatments.View Video

Anisocoria
Is one pupil bigger than the other? Learn about anisocoria (unequal pupils).

Astigmatism
Usually caused by an irregular cornea, astigmatism causes blur at all distances.
Bell's Palsy
This condition causes sudden paralysis of one side of the face. Because it affects blinking, it can cause severe dry eye.

Bionic Eye Implants
Learn about retinal implants that are restoring functional vision to people with retinitis pigmentosa and other blinding conditions.

Black Eye
How serious is a black eye? How to treat black eyes.

Blepharitis
Inflammation of the eyelids associated with chronic eye irritation, watery eyes, foreign body sensation, sensitivity to light and crusty debris at the base of the eyelashes.View Video

Blurry Vision
Blurry vision has many causes, from fatigue and eyestrain to serious eye diseases such as glaucoma. A video helps explain blurry vision causes and treatments.

Burning Eyes
How to get relief from burning, stinging eyes.
Cataracts
The risk of cataracts increases with age. Learn what causes them and how to protect your eyes.View Video

Cataract Surgery
It's the most common non-elective surgery in the United States. Recent innovations include laser-assisted cataract surgery.

Chalazion
A swollen bump in the eyelid. Learn about causes and treatments.

Clinical Trials Related to Eye Diseases
Find out the status of clinical trials for treatment of glaucoma, macular degeneration, blepharitis and other eye problems and diseases.

CMV Retinitis
About 80 percent of adults have been exposed to the cytomegalovirus (CMV), but it mostly affects people with poor immune systems, such as AIDS patients.

Color Blindness
Learn the varieties of color vision deficiency and how to cope with color blindness.

Common Eye Disorders
How to identify and manage everyday eye problems.

Concussion, TBI and Vision
Up to 90 percent of people who suffer from concussion or other traumatic brain injury experience vision problems such as blurry vision, sensitivity to light and difficulties with eye movements. Learn what can be done.

Conjunctivitis (Pink Eye)
What you can do about redness, swelling, itching and tearing of pink eye. Learn about pink eye treatment and the various conjunctivitis types. Find out answers to common questions such as how long pink eye lasts, how to get rid of pink eye and how long pink eye is contagious.

Cornea Transplant
Eye injuries and diseases like keratoconus may require a cornea transplant, using healthy tissue from an eye donor.

Corneal Abrasion (Scratched Eye)
A scratched cornea is usually very painful. What to do if it happens to you.

Corneal Collagen Crosslinking
Not yet FDA-approved, these procedures can strengthen the front surface of the eye and help keratoconus patients avoid a cornea transplant.

Corneal Ulcer
Treatment may help prevent scarring on your eye.
Detached Retina
Flashes of light and floating spots are classic warning signs of a detached retina — get them checked out ASAP.

Diabetic Retinopathy
Damage to the eye's retina due to diabetes.

Different Colored Eyes (Heterochromia)
Many people (and animals) have two different colored eyes. What causes it? Is it a problem that requires an eye exam?

Dilated Pupils
What causes larger-than-normal pupils and what to do about it.

Double Vision (Diplopia)
Many conditions cause double vision, including stroke and cataracts. What to do.

Dry Eye Infographic 
Learn eight symptoms, causes and steps to managing dry eye.View Video

Dry Eye Syndrome
Why eyes get dry. Also read about dry eye treatments and relief, such as eye drops, tear duct (punctal) plugs and nutritional supplements for more eye moisture. Also, see the dry eye doctor's answers to reader questions.
Eye Allergies
Itchy, red, swollen, tearing eyes may mean eye allergies. Get tips for relief, and read our Eye Doctor Q&A about common eye allergy symptoms.

Eye and Vision News
Breaking news about eye care and vision problems.

Eye and Vision Product News
New eyewear and vision care products designed to improve your life.

Eye Herpes
Ocular herpes is a recurrent viral infection that may lead to serious vision loss. Read how herpes of the eye is transmitted and treated.

Eye Infections
Learn about bacterial, viral and fungal eye infections, including symptoms.

Eye Injury: A Guide to Treatment
Accidents cause many kinds of eye injuries, from corneal scratches to penetrating wounds. What to do for an eye emergency.

Eye Occlusions (Eye Strokes)
Sudden vision loss can occur when a clot or blockage interrupts blood flow to vital eye structures.

Eye Pain
How to know if a painful eye is an emergency.

Eye Symptoms A to Z
A list of nearly 100 eye symptoms and the problems and diseases associated with them.

Eye Twitching
Eyelid twitches, tics and spasms are maddening. Here are eight remedies you can try.
Floaters, Flashes and Spots
Eye floaters and flashes may be harmless, or they may signal a serious problem, like a detached retina.View Video

Fuchs' Corneal Dystrophy
Causes loss of vision and clouding of the cornea due to degeneration of the corneal endothelium and corneal edema.
Glaucoma
Glaucoma damages the optic nerve and diminishes the field of vision. Learn about glaucoma causes, eye drops for glaucoma, narrow-angle glaucoma, primary open-angle glaucoma and glaucoma surgery.View Video

Glaucoma Surgery
New options for controlling glaucoma with surgery.
Higher-Order Aberrations
Higher-order aberrations (HOAs) are vision errors causing poor night vision or double images.

Hordeolum
View Video

Hyperopia (Farsightedness)
Farsighted people can have poor near vision or blurred vision at all distances.View Video

Hyphema
A hyphema is a broken blood vessel in the eye that causes blood to collect in the space between the cornea and iris. It's usually painful and can cause glaucoma.
Intacs for Keratoconus
These tiny corneal inserts can help flatten a bulging eye.

Itchy Eyes
What causes itchy eyes and eyelids — and how to get relief.
Keratoconus
Special contact lenses can help this condition that changes the shape of your eye. You can read answers to reader questions on our Ask the Eye Doctor About Keratoconus page.
Losing an Eye: Enucleation and Prosthetic Eye FAQ
FAQ about eye removal surgery (enucleation) and glass eyes.
Macular Degeneration (AMD)
Our 10-page section covers this sight-threatening disease, plus FDA-approved macular degeneration treatments, investigational treatments, macular degeneration prevention, how to use an Amsler Grid and the Lucentis vs. Avastin treatment debate. Stargardt's disease is a form of macular degeneration that can affect children.View Video

Macular Dystrophy
Central vision loss can be associated with this inherited eye disease.

Macular Hole
Suddenly blurry or distorted vision, especially in seniors and diabetics, may mean a macular hole.

Meibomian Gland Dysfunction
MGD is the culprit behind most cases of dry eye syndrome. Find out how to spot it and what you can do to get relief.

Milia (Eyelid Cysts)
What causes those tiny eyelid cysts in babies and adults, and how they are treated.

Myopia (Nearsightedness)
Nearsighted people can see fine up close, but distant objects are a blur.View Video
Nystagmus
Uncontrollable eye movements from nystagmus often have neurological causes.
Ocular Hypertension
High eye pressure has no symptoms, but can be easily detected in an eye exam. Learn what can be done to prevent glaucoma and possible eye damage.

Ocular Migraine
Ocular migraine causes a sensation of looking through shattered glass. What's happening?View Video

Ocular Rosacea
How to solve eye and eyelid irritation.

Optic Neuritis and Optic Neuropathy
An inflamed optic nerve can cause blurry vision and blind spots.
Peripheral Vision Loss
"Tunnel vision" can have various causes, including glaucoma.

Photophobia (Light Sensitivity)
Sensitive to light? Many eye conditions can cause this problem.

Pinguecula
Pingueculae are growths on the eye. Are they serious?

Presbyopia
All about this normal age-related loss of focusing ability that becomes noticeable after age 40. Also, read answers to frequently asked questions for a quick overview.View Video

Pterygium
Pterygia, also called "surfer's eye," are growths on the eyeball that can interfere with vision.View Video

Ptosis (Drooping Eyelid)
Drooping eyelids can be corrected with ptosis repair surgery, which tightens the muscle that supports the upper eyelid.
Red Eyes
Red eyes can be caused by allergies, eye infections and eye injuries. Learn more causes of red eye and how to treat bloodshot eyes.
Strabismus
View Video