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What is it? A loss of central vision in both eyes.
What causes it? Macular degeneration (AMD) is caused by deterioration of the retina and can severely impair vision, and is usually age-related.
What are the symptoms? Some symptoms may be that straight lines start to appear distorted, or the center of vision becomes distorted; dark, blurry, or white out areas appear in the center of vision; and color perception may change or diminish.
How is it treated? There is no cure for macular degeneration, but it can be treated with vitamins, laser therapy, medications, and vision aids.
What is it? One eye sees better than the other; a problem of childhood development. The weaker eye may or may not “wander.” The weaker eye is called the "lazy eye."
What causes it? Amblyopia usually starts when one eye has much better focus than the other eye. For example, when the child's brain is confronted with both a blurry image and a clear image, it will begin to ignore the blurry image. If this goes on for months or years, the vision in the eye that sees the blurry image will deteriorate.
How can it be detected? All children should be screened before they are school age. Your child's doctor or the vision program at school will check three aspects of your child's eye health: that your child's eyes let light all the way through; that both eyes see equally well; and, that the eyes are moving normally.
How is it treated? The most common treatment for amblyopia is to force the brain to start using the "bad" eye by putting a patch over the "good" eye.
What is it? A defect that causes an inability to properly focus light onto the retina. Astigmatism causes blurry vision that can be corrected with glasses or contact lenses.
What causes it? Astigmatism can be hereditary and is often present at birth. It can also result from pressure from the eyelids on the cornea, incorrect posture, or an increased use of the eyes for close work.
What are the symptoms? People with undetected astigmatism often experience headaches, fatigue,
eyestrain, and blurred vision at all distances. While these symptoms may not necessarily be the result of astigmatism, you should schedule an eye exam if you are experiencing one or more symptoms.
How is it treated? Almost all degrees of astigmatism can be corrected with properly prescribed
eyeglasses or contact lenses.
What is it? A clouding of the lens, which hinders the passage of light through the lens.
What causes it? A cataract occurs when there is a buildup of protein in the lens that makes it
What are the symptoms? Cataracts usually form slowly and cause few symptoms until they noticeably
block light. When symptoms are present, they can include: vision that is cloudy, blurry, foggy, or filmy; progressive nearsightedness in older people often called "second sight" because they may no longer need glasses; changes in the way you see color because the discolored lens acts as a filter; problems driving at night such as glare from oncoming headlights; problems with glare during the day; double vision; and sudden changes in glasses prescription.
How is it treated? If your vision can be corrected to an acceptable level with a change in prescription, eyeglasses, including bifocals or contacts, may be prescribed, eliminating the need for surgery at that time. If not, then surgery may be necessary.
What is it? Also known as "pinkeye,” conjunctivitis is an infection or inflammation of the conjunctiva.
What causes it? It is usually caused by allergies, a virus, or a bacterial infection.
What are the symptoms? The symptoms of pinkeye differ based on the cause of the inflammation, but may include redness in the white of the eye or inner eyelid, increased amount of tears, thick yellow discharge that crusts over the eyelashes, especially after sleep, green or white discharge from the eye, itchy eyes, burning eyes, blurred vision, increased sensitivity to light.
How is it treated? Treatment depends on the type of conjunctivitis, but you may relieve the symptoms of pinkeye by protecting your eyes from dirt and other irritating substances, avoiding the use of makeup, removing contact lenses if you wear them, using non-prescription "artificial tears" which may help relieve itching and burning from the irritating substances causing your pinkeye.
What is it? High blood sugar damages blood vessels in the eye. Eventually, weakened blood vessels may overgrow the retina or bleed, threatening vision.
What causes it?Anyone with diabetes - both type 1 or type 2 diabetes - is at risk of developing diabetic retinopathy. However, the type of diabetes a person has, how often their blood glucose fluctuates, how well controlled the sugars are, and how long a person has had diabetes all affects his or her risk. The better you control your blood sugar levels, the lower your risk.
What are the symptoms? There are often no early signs of diabetic retinopathy and sight may not be affected until the condition is severe. Sometimes loss of central vision when reading or driving, loss of the ability to see color, and blurriness of vision are the only signs of diabetic retinopathy.
How is it treated? In most cases, laser surgery can prevent significant vision loss associated with diabetic retinopathy. A procedure called laser photocoagulation can be performed to seal or destroy growing or leaking blood vessels in the retina. Although the procedure is not painful, laser surgery may lower a person's night vision and ability to see color.
What is it? Either the eyes don’t produce enough tears, or the tears are of poor quality.
What causes it? Dry eye can be caused by medical problems such as lupus, scleroderma, and Sjogren's syndrome.
What are the symptoms? When tears do not adequately lubricate the eye, a person may experience: pain, light sensitivity, a gritty sensation, a feeling of a foreign body or sand in the eye, itching, redness, or blurring of vision.
How is it treated? Though dry eyes cannot be cured, there are a number of steps that can be taken to treat them. You should discuss treatment options with an ophthalmologist. Treatments for dry eyes may include: artificial tear drops and ointments, temporary punctal occlusion, permanent punctal occlusion, restasis, other medications, including topical steroids, or sometimes surgery may be necessary.
What is it? Increased pressure inside the eye slowly reduces vision. Peripheral vision is lost first, often going undetected for years.
What causes it? Normally, this fluid, called aqueous humor, flows out of the eye through a mesh-like channel. If this channel becomes blocked, fluid builds up, causing glaucoma. The direct cause of this blockage is unknown, but doctors do know that it is most often inherited, meaning it is passed from parents to children.
What are the symptoms? The first sign of glaucoma is often the loss of peripheral or side vision, which can go unnoticed until late in the disease. Detecting glaucoma early is one reason you should have a complete exam with an eye specialist every one to two years.
How is it treated? Glaucoma treatment may include prescription eye drops, laser treatment, or microsurgery.
What is it? Inability to see near objects clearly. The eye is “too short” for the lens, or certain eye muscles have weakened with age.
What causes it? Farsightedness occurs when light entering the eye is focused behind the retina instead of directly on its camera. This is caused by an eye that is too short, whose cornea camera is not curved enough, or whose lens sits farther back in the eye than normal. Farsightedness often runs in families. In rare cases, some diseases such as retinopathy and eye tumors can cause it.
What are the symptoms? Symptoms of farsightedness can include blurred vision (especially at night), trouble seeing objects up close, aching eyes, eyestrain, and headaches.
How is it treated? Most farsighted people don't need treatment. Your eyes can usually adjust to make up for the problem. But as you age and your eyes can't adjust as well, you will probably need eyeglasses or contact lenses. (Glasses or contact lenses can help at any age if farsightedness is more than a mild problem.)
What is it? Inability to see clearly at a distance. The eye is “too long” for the lens, so light isn’t focused properly on the retina.
What causes it? In nearsighted people, the eyeball is too long or the cornea has too much curvature, so the light entering the eye is not focused correctly. Nearsightedness runs in families and usually appears in childhood. Usually the condition plateaus, but it can worsen with age.
What are the symptoms? People who are nearsighted often complain of headaches, eyestrain, squinting, or fatigue when driving, playing sports, or looking more than a few feet away. Children commonly complain of not being able to see the chalkboard at school.
How is it treated? Glasses, contact lenses, or refractive surgery can correct nearsightedness.
What is it? The eyes do not point in the same direction. The brain may then favor one eye, causing decreased vision (amblyopia) in the other eye.
What causes it? Some people are born with eyes that do not align in the usual way. This is called congenital strabismus. In many children, there is no clear cause of strabismus. In some cases, it is the result of a problem with the nervous system.
How is it treated? Vision therapy may be recommended to help a person correct their vision or strengthen their eye muscles. This therapy may help train a patient's brain to align their eyes and focus and visually process images. Vision therapy uses computerized optical devises, including lenses and filters, to develop the eye muscles.
Stye Bacteria infect the skin on the edge of the eyelid, creating a tender red bump.
Chalazion An oil-making gland gets blocked and swells into a bump. Often confused with styes, chalazions are not caused by infections.
Hyphema Bleeding into the front of the eye, behind the cornea. Hyphema is usually caused by trauma.
Blepharitis Inflammation of the eyelids near the eyelashes. Blepharitis is a common cause of itching or a feeling of grit in the eyes.
Corneal Abrasion A scratch on the clear part of the front of the eye. Pain, light sensitivity, or a feeling of grit in the eye are the usual symptoms.
Keratitis Inflammation or infection of the cornea. Keratitis typically occurs after germs enter a corneal abrasion.
Retinitis Inflammation or infection of the retina. Retinitis may be a long-term genetic condition or result from a viral infection.
Uveitis (Iritis) The colored part of the eye becomes inflamed or infected. An overactive immune system, bacteria, or viruses can be responsible.
Optic Neuritis The optic nerve becomes inflamed, usually from an overactive immune system. Painful vision loss in one eye typically results.
Black Eye Swelling and discoloration around the eye as a result of injury to the face.