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What is lazy eye?

Amblyopia or lazy eye develops when your brain can't recognize the sight from one eye. As a result, it relies more and more on the stronger eye, and vision in the affected eye becomes gradually weaker.

(The reason it's called lazy eye is that one eye is stronger and works better than the other.)

"One eye is not getting a clear image, and the brain says 'I will pay attention to the eye with the clear image, not the other one,'" explains Kammi Gunton, MD, an ophthalmologist at Wills Eye Hospital in Philadelphia.

Identifying and treating amblyopia early can prevent any long-term vision problems. Here's everything you need to know.

Lazy eye: understanding your risks

Amblyopia begins in childhood and affects up to three of every 100 children, according to the National Eye Institute.

Risks for developing this condition include:

being born too early
being born too small for gestational age
family history of amblyopia, childhood cataracts, or other eye conditions
history of developmental disabilities

Strabismus vs. amblyopia

The most common cause of amblyopia is a refractory error such as nearsightedness (trouble seeing far away), farsightedness (trouble seeing things up close), and/or astigmatism (which can cause blurry vision), Dr. Gunton says.

One type of amblyopia, strabismus, is a misalignment of the eyes. Your eyes may not line up, and/or one may drift up, down, or to the side, explains Wadih Zein, MD, staff clinician at the Ophthalmic Clinical Genetics Section of the National Eye Institute in Bethesda, Maryland.

Parents are often able to spot strabismus because they can see that their child's eye is wandering.

"Strabismus is usually obvious, but sometimes the angle is so small that parents can't see it," Dr. Zein says.

It's not as easy to pick up amblyopia from a refractory error without a vision test. There can be red flags, including squinting, shutting one eye to focus, and/or tilting the head when watching TV.

These are 7 silent signs your child might have a lazy eye.

Diagnosing amblyopia

"Amblyopia needs to be screened for and, if identified, needs to be addressed, and if it is addressed early enough, there's a good chance that patients will regain optimal vision in the affected eye or eyes," Dr. Zein says.

Screening for amblyopia is sometimes as simple as your child reading the eye chart during a routine well visit with the pediatrician.

The American Academy of Pediatrics recommends a vision screen by 6 months of age as part of a well visit to check for vision development and alignment of the eyes. Further yearly screening occurs as the child ages and vision continues to develop.

"If a refractory error is picked up during a routine vision screen, your pediatrician will likely refer your child to a pediatric ophthalmologist for further evaluation," Dr. Zein says.

How to fix lazy eye

If your child has a lazy eye, the key is to intervene when vision is still developing.

"If we can get kids diagnosed before age 3 and start treatment, our success rate is much better," Dr. Gunton says. "After the age of 12, it's almost impossible to treat. You don't have time to waste."

If the better-seeing eye becomes diseased or injured, the "lazy" one can't compensate, she notes.

In addition to affecting vision, an untreated lazy eye can affect the quality of life in older kids and adults.

Dr. Zein agrees: "If this window closes, it becomes much more difficult to get treatment, and then the child becomes an adult with a lazy eye."

Lazy eye treatment options

Treatment depends on the cause of the amblyopia, he says.

With strabismus, your eye doctor will likely suggest patching the good eye so your brain can learn to work with the "lazy" one. Doctors can also use eye drops to relax and dilate the better-seeing eye so vision is blurry and you must rely on the weaker eye, he says.

Sometimes corrective glasses or lenses and/or surgery will also be needed for strabismus. During strabismus or eye muscle surgery, the eye muscles can be tightened or loosened so the eyes are no longer misaligned, according to the American Academy of Ophthalmology.

When amblyopia is from a refractive error, glasses can usually improve vision and make sure both eyes are on the same page.

"If eyeglasses are not enough, patching or penalizing the better-seeing eye can also play a role," Dr. Zein says. It's also important to treat any underlying eye disease that may be causing amblyopia, such as cataracts.

The last word

Catching amblyopia early before vision has fully developed is the best way to stave off any lasting consequences. The best way to do this is through vision screening during your child's annual well visits.

The coronavirus may live on certain surfaces for days

Bleach

Head to your laundry room and grab that bottle of bleach, according to Consumer Reports. Bleach is a great defense against viruses, and it has been a long time cleaning staple in and outside the laundry room. Don't use it straight from the bottle though as that would be way too strong. Instead, mix a solution of ½ cup of bleach to a gallon of water. Use this to disinfect everything in your kitchen from the sink to the floor. You can even soak your child's toys in a bleach mixture of 2 teaspoons bleach to 1 gallon of water, soak for two minutes, then rinse. Make sure you wear gloves when you use the beach, as it can be irritating and drying for your hands. Lastly, don't keep the bleach solution for more than a few days, because bleach degrades some plastic containers.

Hydrogen peroxide

Head to the medicine cabinet, this time. Per the U.S. Centers for Disease Control and Prevention, common hydrogen peroxide (it should say 3 percent on it) will deactivate the rhinovirus, which is what causes the common cold. Technically, it "produces destructive hydroxyl free radicals that can attack membrane lipids, DNA, and essential cell components." Since the rhinovirus is thought to be more difficult to ax than the coronavirus, it's believed that hydrogen peroxide will work for this as well. Simply pop it into a spray bottle and spray it onto a surface. Let it sit for a few minutes before wiping away.

Isopropyl alcohol

Not to be confused with the alcohol you have in your bar closet, this is an alcohol solution with at least 70 percent alcohol. No need to dilute it, according to Consumer Reports. It's safe for cleaning every surface but beware of plastics, as it may cause discoloration. Try this bottle, which has more than 99 percent pure isopropyl alcohol.

Soap and water

Skip: Homemade hand sanitizer

Contrary to popular social media opinion, homemade hand sanitizer may not work as well as your friends may have you believe. That's because the hand sanitizers you purchase in the store are correctly formulated with more science than simply mixing a little water, aloe, and essential oils, according to Consumer Reports. If you can't get your hands on the real stuff, then simply wash your hands with soap and water. Plus, regular hand sanitizer doesn't last as long as you think.

Skip: Vodka

Pass on the vodka (for cleaning purposes, at least). While alcohol in the percentage range of Isopropyl will do the job nicely, vodka is no match for the coronavirus. Tito's Vodka even tweeted advice: "Per the Center for Disease Control and Prevention, washing hands with soap and water is the best way to get rid of germs in most situations. If soap and water are not readily available, you can use an alcohol-based hand sanitizer that contains at least 60 percent alcohol. Tito's Handmade Vodka is 40 percent alcohol, and therefore does not meet the current recommendation of the CDC." Next, check out our coronavirus cleaning guide.

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