Health A-Z

Eye Health

Your eyes are your windows to the world. Learn how to maintain your eye health and what to expect from exams and treatments for common vision problems.

Ophthalmologist doctor with the snellen chart

Astigmatism: Signs, Symptoms, and Complications

By Luana Ferreira

Watery Eyes: Overview and More

By Rachael Zimlich, BSN, RN

How Long Is Pink Eye Contagious?

By Luana Ferreira

What Causes Eye Floaters?

By Luana Ferreira

Explore Eye Health

For What Causes a Stye?

Styes: Causes and Risk Factors

By Mali Schantz-Feld

Farsightedness: Overview and More

By Luana Ferreira

Viral conjunctivitis is highly contagious.

Viral Conjunctivitis: Overview and More

By Brian Mastroianni

eye and letters

How To Improve Your Eyesight

By Brian Mastroianni

color blindness test

What Is a Red-Green Color Blind Test?

By Mali Schantz-Feld

Man takes photo with phone on rock empire

What Do Color-Blind People See?

By Margaret Etudo

Double Vision (Diplopia): Causes

By Luana Ferreira

What Makes My Eyelid Sore?

By Luana Ferreira

a woman tired from looking at her laptop

Do Eye Exercises Improve Your Vision?

By Mali Schantz-Feld

Young woman applying eye drops

Prednisolone: Uses, Side Effects, Dosages, Precautions

By Rachel Macpherson

halos around lights

What Causes Halos Around Lights?

By Luana Ferreira

a man looking a computer

Do Blue Light Glasses Work?

By Luana Ferreira

How Long Does Lasik Surgery Last?

Permanent or Temporary: How Long Does LASIK Last?

By Mali Schantz-Feld

optician testing eyesight

Depth Perception Test: How It Works

By Mali Schantz-Feld

man with hordeolum ill eye

How Long Does a Stye Last?

By Steph Coelho

Applying eye ointment to the inside of the lower lid

Antibiotic Eye Ointments: Uses, Side Effects, Dosages

By Maxine Lipner

woman putting eye drops in her eyes

Can You Put Neosporin in Your Eye?

By Mali Schantz-Feld

An ophthalmologist performs an eye exam

How To Get Rid of Eye Floaters

Medically reviewed by Johnstone M. Kim, MD

Images show what to expect during an eye exam.

Optometrist: Expertise, Specialties, and Training

By Vanessa Caceres

close up of woman with brown eyes

What Is the Rarest Eye Color?

Medically reviewed by Ami A. Shah, MD

Man takes Durezol eyedrop to soothe pain, redness and swelling.

Durezol: Uses, Side Effects, Dosages, Precautions

By Maxine Lipner

Portrait of stylish young man sitting on sidewalk

The 8 Best Places to Buy Glasses Online in 2021

Fact checked by Ashley Hall

Coloboma: Overview and More

By Sherry Christiansen

At optician's office.

Retinal Tear: Symptoms, Causes, Diagnosis, and Treatment

Medically reviewed by Johnstone M. Kim, MD

Nystagmus: Symptoms, Causes, Diagnosis, and Treatment

Medically reviewed by Johnstone M. Kim, MD

Aniridia: Symptoms, Causes, Diagnosis, Treatment, and Coping

Medically reviewed by Johnstone M. Kim, MD

Woman putting cleaning dilution into contact lens case

The 10 Best Contact Lens Solutions of 2021

Fact checked by Ashley Hall

Woman talking with eye doctor

What Your Blind Spot Really Is

Medically reviewed by Richard N. Fogoros, MD

A close-up of an older man's eyes.

Charles Bonnet Syndrome: Symptoms, Causes, Diagnosis, and Treatment

Medically reviewed by Johnstone M. Kim, MD

Doctor examining man's eyes

Epiretinal Membrane Condition and Your Retina

Medically reviewed by Johnstone M. Kim, MD

Young man, close-up (focus on eye)

Overview of Phorias and Tropias

Medically reviewed by Ami A. Shah, MD

Woman getting cornea examined at doctor

Corneal Haze Is a Cloudy Layer in the Eye

Medically reviewed by Johnstone M. Kim, MD

Emmetropia and Refractive Errors

Medically reviewed by Johnstone M. Kim, MD

Tunnel Vision - Loss of Peripheral Vision

Medically reviewed by Johnstone M. Kim, MD

Doctor looking at patient through glasses

Arcus Senilis: Symptoms, Causes, Diagnosis, and Treatment

Medically reviewed by Ami A. Shah, MD

Causes and Conditions of Yellow Eyes

Medically reviewed by Johnstone M. Kim, MD

Optician looking into patients eyes at small business opticians

Papilledema: Symptoms, Causes, Diagnosis and Treatment

Medically reviewed by Claudia Chaves, MD

20/20 Vision and Visual Acuity

Medically reviewed by David R. Watt, MD

A bridge beginning close and ending at a distance

Your Ability to Judge Distance With Depth Perception

Medically reviewed by Johnstone M. Kim, MD

Silver ballpoint pen pointing to letter in eyesight check table

Snellen Eye Chart for Testing Vision

Medically reviewed by Ami A. Shah, MD

The Human Cornea

How the Cornea Is Important for Our Vision

Medically reviewed by Johnstone M. Kim, MD

The Act of Blinking

Why You Blink Your Eyes

Medically reviewed by Johnstone M. Kim, MD

bifocal glasses sitting on a wooden table

Do You Need Bifocal Lenses?

Medically reviewed by Ami A. Shah, MD

Elderly man examined by an ophthalmologist

Lens - Transparent Structure of the Eye

Medically reviewed by Johnstone M. Kim, MD

Intense students learning in a lecture hall

Accommodative Spasm From Constant Focus

Medically reviewed by Johnstone M. Kim, MD

A surgeon ready to insert the intraocular lens implant.

Phacoemulsification - Cataract Surgery

Medically reviewed by Johnstone M. Kim, MD

A man having his blood pressure checked

Hypertensive Retinopathy Symptoms and Treatment

Medically reviewed by Johnstone M. Kim, MD

man with heterochromia

Heterochromia: Symptoms, Causes, Diagnosis, Treatment

Medically reviewed by Johnstone M. Kim, MD

Eye doctor discussing eye care issues.

Types of Eye Doctor Specialists

Medically reviewed by Ami A. Shah, MD

eye examination

Lutein: Benefits, Side Effects, Dosage, and Interactions

Medically reviewed by Johnstone M. Kim, MD

asian man rubbing his eye

What Can Cause Watery Eyes?

Medically reviewed by Johnstone M. Kim, MD

Corneal Arcus: What the Ring Around Your Cornea Means

Medically reviewed by Bryan M. Wolynski, OD

Tear falling from woman's eye, close-up

The Composition of Tears and Their Role in Eye Health

Medically reviewed by Johnstone M. Kim, MD

Fluorometholone

What You Need to Know About Fluorometholone

Medically reviewed by Johnstone M. Kim, MD

The Best Places for Eye Exams in 2021

By Troy Bedinghaus, OD

Man having an eye exam

Eye Health: Why You Need an Eye Exam

Medically reviewed by Ami A. Shah, MD

Nuclear Sclerosis Cataracts

Nuclear Sclerosis: Symptoms, Causes, and Treatment

Medically reviewed by Richard N. Fogoros, MD

Newborn baby eye care

Congenital Cataracts: Symptoms, Causes, and Treatment

Medically reviewed by Joel Forman, MD

A green-eyes woman looking forward

Signs and Symptoms of Eye Cancer

Medically reviewed by Doru Paul, MD

Aging Causes Eye Problems and Diseases in the Elderly

Medically reviewed by Ami A. Shah, MD