Amblyopia (also called lazy eye) is a condition where only one eye has poor vision. It happens when the brain and the eye don’t operate together properly, and the brain can’t recognize sight from one eye. The brain becomes increasingly reliant on the other, stronger eye over time, while vision in the weaker eye worsened.

Because the stronger eye works better, it’s dubbed “lazy eye.” People with amblyopia, on the other hand, are not lazy, and they have no control over how their eyes work.

Amblyopia is the most prevalent cause of visual loss in children, and it begins in childhood. It affects up to three out of every hundred children. The good news is that early therapy is effective and can often prevent long-term vision problems.

Early treatment can help your child avoid long-term visual problems. Glasses, contact lenses, or patching therapy may typically correct the eyesight of the eye with poor vision.

What Are The Symptoms Of Amblyopia?

The following are some of the signs and symptoms of the lazy eye:

  • An eye that wanders inside or outward
  • Eyes that don’t seem to work together
  • Poor depth perception
  • Squinting or shutting an eye
  • Head tilting
  • Abnormal vision screening test results

Without an eye exam, a lazy eye may not be visible.

When Should You See A Doctor?

If your child’s eye wanders after the first few weeks of life, take him or her to the doctor. If you have a family history of crossed eyes, childhood cataracts, or other eye disorders, a vision check is extremely crucial.

Between the ages of 3 and 5, all children should have a full eye checkup.

What Causes Amblyopia?

Lazy eye can be caused by anything that obstructs vision in either eye throughout a child’s growth. Although the causes for this are unknown, the brain suppresses images from the afflicted eye.

Some possible causes are listed below.

The muscles that position the eyes are out of equilibrium, causing the eyes to cross or turn out. Because of the muscle imbalance, it’s difficult for both eyes to track objects at the same time. Strabismus can be inherited, or it can be caused by nearsightedness, a viral infection, or an injury.

Anisometropic amblyopia
When light does not focus properly as it travels through the lens of the eye, it is called a refractive error. Nearsightedness, farsightedness, and astigmatism are conditions in which the surface of the cornea or lens is uneven, resulting in blurred vision.

When a child has anisometropic amblyopia, one eye is more farsighted or nearsighted than the other, causing amblyopia to develop in the affected eye.

Stimulus deprivation amblyopia
This is the rarest type of amblyopia. One eye becomes weaker as it is unable to see. Both can be affected at times.

This could be as a result of:

  • a corneal ulcer, a scar, or another eye illness could be to blame.
  • ptosis, or droopy eyelids, a congenital cataract in which a baby is born with clouding of the lens
  • glaucoma
  • injury to the eye
  • surgery to the eye

Factors that are at risk

The following factors have been linked to an increased incidence of lazy eye:

  • Premature birth,
  • small birth size,
  • and a family history of lazy eye are all
  • Disabilities in development

Lazy eyes, if left untreated, can result in permanent visual loss.


An eye exam will be performed by your doctor to check for eye health, a wandering eye, a vision disparity between the eyes, or poor vision in both eyes. Eyedrops are commonly used to dilate the pupils of the eyes. The eyedrops induce blurry vision that can last several hours or even a day.

The method used to test vision is determined by your child’s age and developmental stage:

  • Children who are not yet verbal. Cataracts can be detected using a lit magnifying device. Other tests can be used to evaluate an infant’s or toddler’s ability to maintain a fixed focus and follow a moving object.
  • Children aged three and up. The child’s vision can be assessed using drawings or letters. To test the other, each eye is covered in turn.

Amblyopia Treatment

eye patching

It’s critical to begin treatment for the lazy eye as early as possible in childhood, while the eye’s and brain’s intricate connections are still growing. Although half of the children between the ages of 7 and 17 respond to treatment, the best benefits occur when treatment begins before age 7.

Treatment options are determined by the source of your child’s lazy eye and the extent to which the issue is impacting his or her vision. Your doctor may advise you to:

  • Corrective lenses. Lazy eye can be corrected with glasses or contact lenses if the problem is nearsightedness, farsightedness, or astigmatism.
  • Patches for the eyes. Your youngster wears an eye patch over the stronger vision eye for two to six hours or more each day to stimulate the weaker eye. In rare situations, wearing a patch for an extended period of time might lead to amblyopia in the patched eye. It is, however, frequently reversible.
  • There’s a Bangerter filter. This unique filter is applied to the stronger eye’s eyeglass lens. The filter blurs the stronger eye while stimulating the weaker one, similar to an eye patch.
  • Eyedrops. A drop of atropine (Isopto Atropine), a medicine, can temporarily obscure vision in the stronger eye. The drops, which are usually prescribed for use on weekends or daily, encourage your youngster to utilize the weaker eye and provide an alternative to a patch. Light sensitivity and eye discomfort are two common side effects.
  • Surgery. If your child has droopy eyelids or cataracts that induce deprivation amblyopia, surgery may be required. In addition to various lazy eye therapies, your doctor may offer surgical correction to straighten your child’s eyes if they continue to cross or wander apart with the appropriate glasses.

There are exercise treatments available, such as sketching, problem-solving, and computer games. The efficacy of combining these exercises with other therapy has yet to be proven. New treatments are still being researched.

Most children with lazy eyes improve their vision within weeks to months with proper therapy. The duration of treatment can range from six months to two years.

It’s critical to keep an eye on your child for recurrence of lazy eye, which can affect up to 25% of children with the condition. If your lazy eye reappears, you’ll need to restart your treatment.

Is It Possible To Correct A Lazy Eye With Lasik?

LASIK is a laser eye surgery that corrects refractive vision disorders and improves vision. LASIK can help fix the lazy eyes, but only when it’s caused by a refractive error differential between the two eyes (refractive amblyopia).

LASIK surgery can make your eyes’ prescriptions more equal, decreasing the problems that come with one eye working harder than the other.

While LASIK isn’t a cure-all for refractive amblyopia, it can be an important part of the recovery process. Other amblyopia therapies that help your brain perceive the enhanced vision in your lazy eye work best in conjunction with LASIK.

Laser eye surgery, on the other hand, is unlikely to help if amblyopia is caused by misaligned/crossed eyes or obscured vision. LASIK cannot be performed on youngsters, thus it is not a viable option for children with amblyopia.

Is It Possible To Correct A Lazy Eye?

While LASIK can aid in the treatment of refractive amblyopia, it cannot be used to cure other types of sluggish eyes or youngsters. There are, however, different methods for treating all types of amblyopia. These can be helpful on their own or in conjunction with LASIK in some circumstances.

Treatments frequently entail “equalizing” the vision in both eyes so that the brain is forced to use the lazy eye. This may entail using a stronger glasses lens prescription in the lazy eye than in the other eye to improve vision. Other times, this entails obstructing vision in the “good” eye with an eyepatch or eye drops, forcing the brain to utilize the lazy eye.

Eye exercises might also help you manage your lazy eye. These usually include a patient focusing for long amounts of time on small or stationary objects or words, activities that force the brain to work more closely with the eyes.

Dietary changes are also significant because they give vitamins that aid in brain and visual function. All of these therapies should only be carried out under the supervision of a physician.

Is It Possible To Correct Lazy Eye In Adults?

Adults can be treated for lazy eye, but it’s far more difficult to correct if it’s not discovered early. Adults are typically slower to help or less effective than children when it comes to vision therapy.

Some features of amblyopia, however, can only be cured in adults. For example, LASIK can only be performed on patients above the age of 18 who have had their eyes stabilized for a particular period of time.


Blindness: If left untreated, the patient’s eyesight in the affected eye may progressively increase. This loss of vision is frequently impossible. Lazy eye is the most common cause, according to the National Eye Institute. Trusted Single-eye visual impairment in young and middle-aged individuals in the United States is caused by a variety of factors.

Eye turn: Strabismus, or misalignment of the eyes, can become permanent.

Central vision: The patient’s central vision may not develop correctly if amblyopia is not treated during childhood. Their ability to perform particular duties may be harmed as a result of the condition.

Tetris Video Game Aids in the Treatment of Lazy Eye

tetris game for Amblyopia

According to new research undertaken by scientists at the McGill University Health Centre’s Research Institute, a variation of the popular video game Tetris has been proven beneficial in treating adult amblyopia, popularly known as “lazy eye” (RI-MUHC).

Amblyopia affects roughly 3% of the population and is one of the most prevalent causes of visual impairment. It happens when the stronger eye suppresses the weaker eye as a result of faulty brain processing. A person with a lazy eye will be unable to focus correctly with one of their eyes, resulting in blurry images in the eye with impaired vision (amblyopia).

Patching the stronger eye to make the weaker one work harder is one treatment option for this disease. This type of treatment, however, has only been beneficial in children.

To play the customized version of the puzzle game, information must be given to both eyes, requiring them to work together.

Because of an increase in plasticity in the brain, the amblyopic brain can relearn by making both eyes cooperate.

“The key to improving vision for adults who currently have no other treatment options was to set up conditions that would enable the two eyes to cooperate for the first time in a given task,” said Dr. Robert Hess, Director of Research Department of Ophthalmology at the RI-MUHC and at McGill University.

According to Dr. Hess, the brain has a high level of plasticity, which suggests that vision loss that occurs during early visual development can be treated.

In fact, earlier research has revealed that 15 minutes of recurrent transcranial magnetic stimulation can temporarily release such plasticity (rTMS). For at least 30 minutes after 15 minutes of rTMS therapy, patients’ amblyopic eyes improved contrast sensitivity.

The study, published in the journal Current Biology, looked at how helpful the game Tetris was at treating amblyopic people.

Dr. Hess, who is also the director of McGill Vision Research, said, “We were able to display the game using head-mounted video goggles, so one eye could only see the falling things and the other eye could only view the ground plane objects.” We reasoned that forcing the eyes to operate together might enhance vision in the lazy eye.”

Patients were aided in their recovery by playing Tetris.

They tested the effectiveness of this unique kind of treatment on a total of 18 persons with amblyopia. Half of the patients wore a patch over their stronger eye while the other half played the game, with each eye seeing a different part of the game.

After only two weeks, patients who played the game with both eyes saw a considerable improvement in their weaker eye’s vision. The monocular patching group also improved moderately, but this improvement grew significantly once they began dichoptic training.

A prior study conducted at an eye clinic in India found that patients can treat amblyopia by following a regimen that includes playing video games in addition to traditional amblyopia treatment.

Matching games, riddles, and other eye coordination challenges are common in amblyopia apps. GamE-blyopia, Amblyopia — Lazy Eye, and Lazy Eye Exercises are among the most popular amblyopia Android and iOS apps.

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