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Medically Reviewed
Written by Pooja Rawat, Medical Content Writer
If one of the eyes turns in, out, up or down while the other eye looks ahead, especially when looking at a particular object, it may indicate a squint eye.
Now you might be wondering: what is squint eye, why does it happen, and how to treat squint eye effectively?
A squint, medically known as strabismus (eye misalignment), is a condition in which one eye is turned in a direction that’s different from the other eye. The cause of most strabismus is a problem with neuromuscular control of your eye movement, which involves your brain. Another factor is family history. Eye misalignment can usually affect children as well as adults.
Sometimes it is easy to notice, while in other cases the misalignment appears only when a person is tired, looking in a particular direction, or focusing on a nearby or distant object.
There are various types of strabismus, but broadly speaking, they can be divided into the following groups:
- Esotropias: eye points inward.
- Exotropias: eye points outward.
- Hypertropias: eye points upward.
- Hypotropias: eye points downward.
- Paralytic strabismus: Damage to the 3rd, 4th or 6th cranial nerves as a result of poor blood supply, pressure on the nerve or head injuries will cause limited eye movements and strabismus.
Symptoms of strabismus include: Double vision, eyes that look misaligned, eyes that do not move together, frequent blinking or squinting, particularly in bright sunlight, tilting or turning your head, faulty depth perception, double vision, etc.
The good news is that a squint eye problem can often be assessed and treated. Squint treatment includes eyeglasses or contact lenses, prism lenses, orthoptics (eye exercises), eye drops, ointments or injections of botulinum toxin type A, patching, eye muscle surgery, etc. The treatment depends on the type and cause of the squint, the person’s age, vision, and how well the two eyes work together.
A recent Science Advances 2026 study also highlights how technology may make squint assessment more convenient. Researchers developed an ultralight, skin-like wearable called Eyelectronics, which is powered by a physiology-knowledge-driven end-to-end AI algorithm and uses eyelid strain sensing with AI to assess eye movement. In the reported clinical evaluation, the system achieved 96.6% accuracy for four-direction classification and showed strong agreement with the Hess screen method.
What Is Squint Eye?
A squint eye (eye misalignment) is a condition in which the eyes are unable to line up with one another. In simple words, one eye is turned in a direction that’s different from your other eye. This may happen all the time, or it may come and go.
Causes of Squint Eye
There is no single cause of different types of squint. As the eye alignment depends on the coordinated action of several eye muscles and the nervous system controlling them.
Risk factors for strabismus are
- Problems with the eye muscles
- Differences in vision between the two eyes
- Uncorrected refractive errors.
- Hydrocephalus (is the buildup of cerebrospinal fluid (CSF) in spaces called ventricles deep within the brain).
- Stroke.
- Difficulty controlling eye alignment.
- Neurological (nervous system) problems (problems affecting the nerves or brain pathways involved in eye movement).
- Certain childhood eye conditions.
- Eye injuries or other acquired problems in adults.
Strabismus (Eye Misalignment) Types Include
Doctors name a squint eye problem based on which way the misaligned eye points, how often it occurs, if it happens to one eye only, or if it goes between the left and right eyes.
Strabismus, then, can be described in these ways:
Type of squint | What happens |
Esotropia | One eye turns inward toward the nose. |
Exotropia | One eye turns outward. |
Hypertropia | One eye turns upward. |
Hypotropia | One eye turns downward. |
Constant squint | Misalignment is present most or all of the time. |
Intermittent squint | Misalignment appears only at certain times. |
A Squint Eye Problem: Symptoms
An eye that appears to point in a different direction is the most obvious symptom of strabismus.
Other possible symptoms are:
- One eye turning in, out, up, or down
- Difficulty maintaining eye alignment
- Tilting or turning the head
- Double vision
- Blurred or uncomfortable vision
- Difficulty judging depth and reading
- Closing one eye when looking at objects that are far away or when in bright light
- Eye strain or difficulty focusing
Which is the Best Squint (Strabismus) Treatment
There is no best treatment, as the effective one is decided based on the specific situation, such as the type of squint, its cause, the age, and the condition of vision in each eye.
The following are the options if you are looking for “how to treat squint eye”
1. Prescription Glasses
Prescription glasses can be considered if a squint is caused by a problem with your child’s eyesight, such as long-sightedness.
For some individuals, improving the quality of vision can also help with control of eye alignment.
2. Orthoptics (Eye Exercises) or Vision Therapy
Eye exercises may show an effect on some types of strabismus, particularly convergence insufficiency (a form of exotropia).
In selected cases, exercises can be considered to improve coordination and control between the eyes.
However, these exercises are recommended based on an appropriate eye assessment.
3. Patching
In some children, an eye specialist may recommend covering the stronger eye for a specific period. The purpose is generally to encourage the weaker eye to work more effectively.
Patching is not a universal treatment for every squint, so the schedule should be guided by an eye-care professional.
4. Prism Correction
Prisms can sometimes be incorporated into glasses to treat amblyopia if you have it at the same time as strabismus. As, vision improvement may also improve control of eye misalignment.
Prisms help manage certain types of double vision or eye misalignment.
5. Medications
Eye drops, ointments or injections of botulinum toxin type A (like Botox®) can be recommended to weaken an overactive eye muscle.
6. Eye Muscle Surgery (Strabismus Surgery)
Surgery may be recommended if glasses are not fully effective on their own. During the procedure, the eye surgeon moves the muscles that control eye movement so the eyes line up correctly.
When appropriate, eye muscle surgery may be considered to improve alignment.
Note: Surgery is not necessarily the first treatment for every individual, and the final decision is based on the individual assessment.
Quick Recap: Squint Treatment
Squint treatment | When it may be considered |
Glasses | When refractive/focusing problems are involved |
Patching | Selected childhood vision problems |
Exercises | Certain types of alignment/control problems |
Prism glasses | Selected cases involving misalignment or double vision |
Eye muscle surgery | When surgical correction is considered appropriate |
FAQ's
How to correct squint naturally?
Can squint be treated permanently?
Can squint go away on its own?
How does squint affect vision?
Conclusion
If you ask, “Can strabismus be prevented?” No, you can’t prevent strabismus.
But you can help ensure that any eye condition is found early by asking your child’s healthcare provider to do some testing if you suspect strabismus.
When Should You See an Eye Specialist?
If you suspect that you or your child have eye misalignment, make an appointment with an eye care provider. There are effective treatments for strabismus.
Pay particular attention when:
- A child’s eye repeatedly turns in or out.
- You suddenly develop a squint.
- There is new double vision.
- Vision changes occur along with eye misalignment.
- You have trouble using both eyes together.
- The eye position changes noticeably over time.
For children and adults, it’s crucial to follow the appointment schedule your eye care provider recommends.
Disclaimer: This blog is for informational use only. For accurate information about squint eye treatment, consult your ophthalmologist only.
