OverviewDetecting Eye Diseases and Conditions

To catch eye conditions early and help prevent vision loss, you should get a baseline eye exam when you are 40.

What Is Thyroid Eye Disease?

Thyroid eye disease is an immune system disorder. Inflammation causes the muscles and tissue around your eyes to puff up.

Ocular Hypertension

Ocular hypertension is when the pressure inside the eye is higher than normal.

UveitisWhat Is Uveitis?

The word “uveitis” is used because the swelling most often affects the part of your eye called the uvea.

Iritis

Iritis is inflammation of your iris, the colored part of your eye. It’s also called anterior uveitis.

Is Uveitis a Symptom of Something Else?

Uveitis is inflammation in your eye. You may wonder how you got it. Sometimes, it’s because of another disease.

How Uveitis Is Diagnosed

How will your doctor know you have uveitis? They’ll look at several things.

Why It’s Important to Treat Your Uveitis

If you don’t treat the inflammation caused by uveitis, it can scar or break down tissues in your eye. That can harm your vision.

How Your Uveitis Can Be Treated

What your doctor will prescribe depends on what kind of uveitis you have, where it is in your eye, and if you have it in both eyes.

When Your Uveitis Treatment Isn’t Working

If you have uveitis, you'll usually try steroid treatments first. But there are potential problems with taking steroids long term.

Pupil ProblemsEye Pupils

Pupils are the dark-colored openings at the center of your eyes that let light in.

Why Do My Pupils Look Big?

Sometimes your pupils can dilate without any change in the light. The medical term for it is mydriasis.

What is Anisocoria?

Anisocoria is a condition in which the two pupils of the eye are unequal in size.

What Is Eye Miosis?

When your pupil shrinks in bright light, it's called miosis. If your pupils stay small even in dim light, it's abnormal miosis.

What Is Leukocoria?

Leukocoria means "white pupil." It describes a condition where the pupil of the eye is white rather than black.

Rare Eye Diseases & ConditionsNeuromyelitis Optica Symptoms

Often, the first signs of neuromyelitis optica (NMO) are sudden eye pain and vision problems.

Living With Neuromyelitis Optica

Certain devices, lifestyle changes, and therapies can help you live with neuromyelitis optica as well as you can.

What to Know About Optic Nerve Drusen

Optic nerve drusen is an eye problem that could occur at any age. It can cause some mild visual issues but is usually symptomless.

Heterochromia

Heterochromia is when you have differently colored eyes or eyes that have more than one color.

What Is Aphakia?

Aphakia is a condition in which you're missing the lens of one or both of your eyes.

What Is Ocular Albinism?

Ocular albinism is a rare eye condition that happens much more often in boys and men than in girls or women.

What Is Endophthalmitis?

Endophthalmitis is an uncommon bacterial or fungal infection of the eyeball. It happens inside the tissues or fluids of the eye.

Acute Macular Neuroretinopathy: What to Know

Acute macular neuroretinopathy is a rare condition in which you suddenly develop blurry or small blind spots in one or both eyes.

What Is Visual Snow Syndrome?

Visual snow syndrome is a rare condition that causes a continuous visual disturbance that occupies the whole visual field.

Horner Syndrome

Horner syndrome is a rare condition that causes problems with your face and eye on one side of your body.

What Is Duane Syndrome?

Duane syndrome is a rare eye disorder some people are born with. The muscles and nerves around your eye don't work well together.

What Is Morning Glory Syndrome?

Morning glory syndrome (MGS) is a birth defect that affects the nerve of the eye and causes poor eyesight.

What Is a Peters Anomaly?

Peters anomaly is a rare condition that affects the eyes. It develops before birth due to a genetic mutation.

What Is Coats’ Disease?

Coats’ disease is characterized by problems with the blood vessels in your eye. It can eventually lead to blindness.

Macular Retinal Dystrophy: What You Need to Know

Macular retinal dystrophy is a rare genetic eye disorder that causes vision loss. It affects the back of your eye, or retina.

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