Exotropia: Why Does the Eye Turn Outward and When Should You See a Doctor?

Last Updated: 24/06/2026

Exotropia occurs when one or both eyes turn outward instead of focusing on the same point. Outward eye deviation may appear intermittently when a person is tired, daydreaming, or not focusing, and it may become more noticeable over time if it is not evaluated. Exotropia is not only related to appearance. It may sometimes affect the ability of both eyes to work together, and it may be accompanied by double vision, eye strain, or poor eye control. Therefore, a squint examination helps identify the cause and determine whether the patient needs glasses, follow-up, eye exercises, or another treatment option.

 

Do you have a question about outward eye deviation or repeated squint? Contact the Magrabi team via WhatsApp to understand the suitable specialty and the closest medical next step for your condition.

What Is Exotropia?

Exotropia is a type of squint in which the eye moves outward, away from the direction of the nose. It is medically known as Exotropia, and it is sometimes called divergent squint because the direction of the deviation is outward.

Exotropia may be intermittent. It may appear when the person is tired, looking at a distant object, or losing focus, then the eye returns to its normal position. In some cases, exotropia may be constant, meaning the outward eye deviation remains visible most of the time.

You can read more about squint eye to understand other types of squint and the difference between inward and outward deviation.

What Are the Causes of Exotropia?

The causes of exotropia vary from one person to another. It may be related to how both eyes work together, the strength of vision, or the balance of the external eye muscles. Therefore, judging the condition by eye appearance alone is not enough. Possible causes and factors include:

• A difference in vision strength between the two eyes.
• Reduced ability of both eyes to focus together on the same target.
• A family history of squint or vision problems.
• Poor control of the eye muscles, especially during tiredness or daydreaming.
• Lazy eye in some children.
• Eye or head injuries in some cases.
• Less common neurological or muscular problems, which need evaluation if exotropia appears suddenly.
• Neglecting treatment of intermittent exotropia may make it more noticeable over time.

The Saudi Ministry of Health explains that squint occurs when the eye muscles do not work together in a coordinated way. Therefore, examination helps identify the cause of exotropia and determine the most appropriate way to manage it.

What Are the Symptoms of Exotropia?

Exotropia may be clear in the mirror or in photos, and it may be intermittent, appearing only in certain situations. Noticing the symptoms helps guide the doctor during a squint examination. Common signs may include:

• The eye turning outward clearly or repeatedly.
• Outward eye deviation appearing during tiredness or when focusing on a distant object.
• Closing one eye, especially in bright light.
• Difficulty reading or focusing for a long time.
• Eye strain or headache.
• Double vision in some adults.
• Poor depth perception.
• Noticing that a child loses visual focus during play.
• Difficulty controlling the eye and returning it to its normal position.

Magrabi ophthalmologists explain that one symptom alone is not enough to determine the type of squint. The patient needs an examination that measures the degree of divergent squint and how much it affects vision.

How Is Exotropia Diagnosed?

Diagnosing exotropia depends on a comprehensive medical examination, not only on observing the direction of the eye. The doctor starts by asking the patient or parents when the deviation appeared, whether it is constant or appears at certain times, and whether it is accompanied by poor vision, headache, or double vision. The examination may include:

• Measuring visual acuity in each eye.
• Determining whether glasses are needed.
• Examining eye movement in different directions.
• Measuring the degree of outward eye deviation.
• Testing the ability of both eyes to work together.
• Assessing whether lazy eye is present in children.
• Examining the back of the eye when needed.
• Requesting additional tests if exotropia appears suddenly or is accompanied by neurological symptoms.

The examination result helps the doctor know whether the condition is intermittent or constant, and whether it needs follow-up only or active treatment.

What Are the Treatment Options for Exotropia?

Exotropia treatment depends on age, the degree of deviation, vision strength, the presence of lazy eye, and how well the patient can control the eye. Therefore, the plan differs from one child to another and from one adult to another. Treatment options may include:

• Prescription glasses if the deviation is related to poor or unequal vision.
• Lazy eye treatment in children if one eye is weaker in use.
• Eye exercises or vision therapy in selected cases chosen by the doctor.
• Regular follow-up if exotropia is mild, intermittent, and does not clearly affect vision.
• Squint surgery if the deviation is clear or recurrent and non-surgical options are not enough.
• Exotropia surgery in cases where the doctor believes that adjustment of the eye muscles is needed to improve alignment.

The Egyptian Ministry of Health and Population emphasizes the importance of referring to specialized medical authorities when health problems affect daily life. In exotropia, specialist examination determines whether treatment starts with glasses, follow-up, or another intervention.

Exotropia in Children: When Should Parents Pay Attention?

Exotropia in children may sometimes appear as one eye turning outward when the child is tired, daydreaming, or looking at something far away. Parents may also notice that the child closes one eye in sunlight, tilts the head, or loses visual focus during play and reading.

This does not always mean that the child needs surgery, but it does mean that early evaluation is needed. The doctor checks vision strength, eye movement, and how well the child can control the deviation.

If the deviation appears suddenly, you can read more about the cause of sudden squint in children to understand the signs that require faster examination.

Exotropia in Adults: Is It Different From Children?

Yes, exotropia in adults may differ from exotropia in children in terms of symptoms and causes. Adults may feel double vision more clearly because the brain was previously used to using both eyes together, then the deviation started to affect image clarity.

Exotropia in adults may appear because of old weakness in eye control, after an injury, or due to a problem affecting the nerves or muscles. Therefore, adults need a careful examination, especially if the deviation appears suddenly or is accompanied by headache, dizziness, or a change in vision.

The Qatar Ministry of Public Health notes the importance of vision screening in the early years of life to support healthy visual development and detect vision problems early. This makes follow-up for children who show signs of exotropia an important step to protect visual development.

When Should You Visit an Ophthalmologist?

Doctors at Magrabi Hospitals recommend seeing an ophthalmologist when exotropia is noticed repeatedly, when the deviation increases over time, or when it begins to affect reading, studying, driving, or daily activities. Faster evaluation is needed in the following cases:

• Sudden appearance of exotropia.
• New or disturbing double vision.
• Severe headache or dizziness with the deviation.
• Sudden weakness in vision.
• Inability of the eye to move normally.
• A clear increase in how often the eye turns outward.
• A child repeatedly closing one eye.
• Squint appearing after a head or eye injury.

An examination does not always mean the condition is serious, but it helps identify the cause and determine whether the patient needs glasses, follow-up, eye exercises, or another treatment.

 

If you would like to understand the steps of squint evaluation at Magrabi, you can visit the pediatric squint service page and review the diagnosis and treatment methods the doctor determines for each case.

When Does Exotropia Need Surgery?

Exotropia may need surgery when the outward eye deviation becomes clear or recurrent, or when glasses, follow-up, or eye exercises are not enough to improve eye control. The doctor may also discuss surgery if exotropia causes double vision or affects the ability of both eyes to work together.

The decision to perform exotropia surgery does not depend on eye appearance alone. It depends on the result of the squint examination, the measured degree of deviation, eye movement, and vision strength. The goal of the surgery is to adjust the position of some eye muscles to improve alignment, while follow-up after surgery remains an important part of evaluating the result.

After surgery, the patient or parents may be interested in knowing the eye shape after squint surgery, especially during the first weeks of recovery, because redness or temporary differences in appearance do not always mean that the result is weak.

 

If outward eye deviation is persistent or affects daily comfort, you can book an appointment at Magrabi Health through the booking form or phone call to discuss the condition with an ophthalmologist.

Conclusion

Exotropia is not just a difference in eye direction. It is a condition that may affect visual clarity and the ability of both eyes to work together. Exotropia may be mild and intermittent, or it may need treatment depending on the degree of deviation and symptoms. Early examination helps identify the cause and determine whether glasses, follow-up, or squint surgery is needed at the right time.

References

• Saudi Ministry of Health – Squint in Children
• Qatar Ministry of Public Health – Vision Screening in the Early Years
• Egyptian Ministry of Health and Population – Official Website

 

Edited and medically reviewed by Dr. Mostafa Salah Abdelhafez.

Medical Disclaimer: The information in this article is for health education purposes only and does not replace a visit to a doctor or consultation with a qualified specialist. Magrabi doctors recommend seeking medical evaluation for an accurate diagnosis and appropriate treatment plan.

Last updated: June 23, 2026