Pediatric Squint Surgery

Introduction

If your child has been diagnosed with a squint — where one or both eyes do not point in the same direction — and an eye specialist has suggested surgery, this guide is written for you. It explains what pediatric squint surgery involves, why it is recommended, what happens before, during, and after the operation, and what to expect in the weeks and months that follow.

A squint, known medically as strabismus, is one of the most common eye conditions in children. For some children, glasses, patching, or eye exercises are enough. For others, the eye muscles need to be adjusted surgically so that the eyes can work together. Hearing that your child needs eye surgery is understandably worrying, but pediatric squint surgery is one of the most established operations in children’s eye care and is usually performed as a day-care procedure.

This article walks through the decision points step by step: how surgery fits with other treatments, how the procedure is done, what recovery looks like, what results are realistic, and what long-term follow-up usually involves. It does not replace the conversation with your child’s pediatric ophthalmologist, but it should help you go into that conversation with clearer questions.

What Is Pediatric Squint Surgery?

Pediatric squint surgery, also called strabismus surgery, is an operation that adjusts the muscles around the eye so that both eyes line up and move together more accurately. It is not surgery on the eye itself — the clear front of the eye (the cornea), the lens, and the light-sensitive layer at the back (the retina) are not touched. The work is done on the small muscles attached to the outside of the eyeball.

Each eye has six extraocular muscles that control its movement. These muscles work in pairs and as a group to point both eyes at the same object. When one or more of these muscles is too strong, too weak, or attached in a way that pulls the eye out of alignment, a squint develops. The eye may turn:

• Inward (esotropia)
• Outward (exotropia)
• Upward (hypertropia)
• Downward (hypotropia)

The goal of surgery is to rebalance these muscles so that the eyes are aligned when the child looks straight ahead and when they move their eyes in different directions. In many children this also supports the development of binocular vision — the brain’s ability to combine the images from both eyes into a single three-dimensional picture.

It is important to understand what surgery does and does not do. Surgery changes the position of the eyes. It does not directly sharpen the clarity of vision. If your child also has a refractive error (needing glasses) or amblyopia (lazy eye), those usually need to be treated separately, often before and after surgery.

Why Is Pediatric Squint Surgery Performed?

Surgery is generally considered when the squint is significant, persistent, and cannot be corrected adequately by non-surgical means. Pediatric ophthalmologists may recommend it for several overlapping reasons.

To support healthy visual development

In young children, the visual system is still developing. If the eyes are not aligned, the brain may begin to ignore the signal from one of them. Over time this can lead to amblyopia, where the vision in that eye does not develop normally even though the eye itself is healthy. Aligning the eyes early can help the brain learn to use both eyes together.

To restore or preserve binocular vision and depth perception

Binocular vision — using both eyes together — is what gives us depth perception. It helps with everyday tasks like catching a ball, judging stairs, pouring water into a cup, and later, driving. Some types of childhood squint, particularly when treated early, give the best chance of developing or recovering this ability.

To eliminate double vision or unusual head postures

Older children with new-onset squint may see double. Some children with squint tilt or turn their heads to find a position where their eyes line up best. Surgery can reduce or remove these symptoms by improving alignment in the straight-ahead position.

To improve appearance and social wellbeing

The visible misalignment of a squint can affect how a child is perceived by peers and how they feel about themselves. Major pediatric ophthalmology organisations, including the American Academy of Ophthalmology, recognise that the psychosocial impact of strabismus is a legitimate reason for treatment, alongside the visual reasons.

Who Is a Candidate?

Whether your child is a candidate for surgery depends on several factors that the pediatric ophthalmologist will assess. These usually include the type and size of the squint, how often the eyes are misaligned, the child’s age, the state of vision in each eye, and the response so far to non-surgical treatments.

Common situations in which surgery is considered include:

• A constant squint that does not improve with glasses alone
• A large-angle squint that is unlikely to be corrected by glasses or prisms
• Intermittent squint that is becoming more frequent or beginning to affect binocular vision
• Squint causing double vision or a sustained head tilt or turn
• Certain forms of infantile esotropia, where early surgery may give the best chance of binocular vision development
• Residual misalignment after maximum benefit has been obtained from glasses and amblyopia treatment

Timing is a key decision. Some squints are best treated in early childhood; others are better managed with glasses and observation first, with surgery considered later if needed. For infantile esotropia, many pediatric ophthalmologists favour surgery within the first one to two years of life, because earlier alignment may better support the development of binocular vision. For accommodative esotropia — a squint caused largely by farsightedness — glasses are usually tried first, and surgery is only considered for any squint that remains when glasses are worn.

Children with neurological conditions, developmental delay, or syndromes affecting the eye muscles can also be candidates, although their assessment and surgical planning may be more complex.

Alternatives to Surgery

Not every child with a squint needs an operation. A careful trial of non-surgical treatment is usually part of the pathway before surgery is considered. Even when surgery is eventually needed, these treatments often continue alongside it.

Glasses

Many childhood squints — particularly accommodative esotropia — are caused or worsened by uncorrected farsightedness. The extra focusing effort the child makes to see clearly triggers the eyes to turn inward. Correcting the refractive error with glasses can fully or partially straighten the eyes without any surgery. In some children, alignment improves so much with glasses that surgery is never needed.

Patching and atropine drops for amblyopia

If one eye has weaker vision than the other, the child may be asked to wear a patch over the stronger eye for part of the day, or to use atropine drops in the stronger eye to blur its vision. Both approaches push the brain to use the weaker eye and help its vision develop. Treating amblyopia is usually prioritised before surgery, because operating on eyes with very unequal vision gives less stable results.

Prism lenses

Prisms built into glasses can bend light so that both eyes receive aligned images, even when the eyes themselves are slightly misaligned. Prisms can be useful for small-angle squints, for managing double vision, and sometimes as a temporary measure while planning surgery.

Orthoptic exercises

For certain types of squint — particularly convergence insufficiency, where the eyes do not pull together well for near tasks — specific eye exercises supervised by an orthoptist may help. Vision exercises are not effective for every type of squint and are best guided by a specialist.

Botulinum toxin injection

In some specific cases, a small injection of botulinum toxin into one of the eye muscles can temporarily weaken it and shift the balance of the eyes. This is sometimes used in selected children, particularly for certain forms of esotropia, or where a brief, reversible correction is preferred. Availability and use vary between centres.

If these approaches do not achieve adequate alignment, or if the type of squint is unlikely to respond to them, surgery becomes the next step.

Surgical Approaches

The basic principle of pediatric squint surgery is the same across techniques: certain eye muscles are weakened, strengthened, or repositioned so that the eyes line up better. The surgeon chooses which muscles to operate on and by how much based on the type and size of the squint, measured during careful pre-operative examination.

Recession

A recession weakens a muscle that is pulling the eye too strongly in one direction. The muscle is detached from its current position on the eye, moved further back, and reattached. This reduces its pull. Recession is one of the most commonly used techniques in childhood squint surgery.

Resection

A resection strengthens a muscle that is too weak to balance its opposing muscle. A small section of the muscle is removed and the shortened muscle is reattached. This effectively tightens it and increases its pull on the eye.

Plication

Plication is another way to strengthen a muscle. Instead of removing a section, the muscle is folded onto itself and stitched in the new shorter position. It is sometimes preferred because it preserves the muscle’s blood supply.

Transposition

In more complex cases, particularly when one muscle is paralysed or extremely weak, the surgeon may reposition neighbouring muscles to take over some of its function. This is called a transposition. It is more often used for vertical squints and certain specialised conditions.

Adjustable suture technique

In selected older children and teenagers who can cooperate after surgery, the surgeon may use a temporary adjustable suture. The muscle is reattached with a knot that can be loosened or tightened a short time after the operation, once the child is awake, to fine-tune alignment. This technique is not generally used in young children, who cannot cooperate with the adjustment.

One operation may involve more than one muscle and more than one eye, depending on the squint. The plan is individualised. Your child’s pediatric ophthalmologist should explain exactly which muscles are being operated on and why.

Preparing for Surgery

Pediatric squint surgery is almost always done under general anaesthesia, so preparation is similar to other planned operations in children.

Pre-operative assessment

Before scheduling surgery, the pediatric ophthalmologist will measure the squint in different positions of gaze, check vision in each eye, examine the inside of the eye, and refract for glasses. A separate assessment by a pediatrician or anaesthetist is usually done to check the child’s general health and fitness for anaesthesia.

If the child has amblyopia, doctors typically aim to treat it as much as possible before surgery, because better-balanced vision before the operation is associated with more stable alignment afterwards.

Fasting and medication

Your child will be asked to fast for a set number of hours before surgery. The exact timing depends on the anaesthetist’s instructions and the child’s age. Usual medications may need to be adjusted on the day of surgery — the team will give specific guidance.

Talking to your child

How you prepare your child depends on their age. Younger children usually do best with brief, simple explanations close to the day of surgery. Older children and teenagers may want more detail. Many hospitals have a child-life specialist or nurse who can show your child the ward, the operating area, and the mask used for anaesthesia, which can reduce anxiety.

It can help to reassure your child that:

• They will be asleep during the operation and will not feel anything
• The eye itself is not removed — only the muscles around it are adjusted
• They will go home the same day in most cases
• Some redness and a sore feeling are expected for a short time afterwards

Practical planning at home

Plan for at least a few quiet days at home after surgery. Have soft food ready in case your child feels nauseous after the anaesthetic. Arrange someone to be with them at all times for the first 24 hours, and plan for an adult to attend follow-up appointments.

What Happens During the Procedure

On the day of surgery, your child will be admitted to a day-care or short-stay unit. The nursing team will check the fasting time, weight, and consent forms, and the anaesthetist and surgeon will meet you to confirm the plan.

Anaesthesia

A pediatric anaesthetist will give a general anaesthetic, usually starting with gas through a mask or with a small injection. Throughout the operation, the anaesthetist monitors heart rate, oxygen, breathing, and depth of anaesthesia. Most pediatric squint surgeries take between 30 and 90 minutes, depending on how many muscles are involved.

The operation itself

Through this opening, the surgeon reaches the eye muscle that is being operated on, measures carefully, and performs the recession, resection, plication, or transposition planned for that muscle. The same is repeated for any other muscles in the surgical plan. The conjunctiva is then closed with dissolvable stitches.

At the end of the operation, antibiotic ointment or drops are usually placed in the eye, and a clear shield or pad may be used briefly. The child is then woken up and moved to the recovery area, where a nurse stays with them until they are alert enough to return to the ward.

Waking up and going home

It is common for children to be groggy, irritable, or tearful for the first hour or two after waking. Some children feel nauseous. Most are well enough to go home the same day, once they have had something to drink, passed urine, and been reviewed by the surgical team.

Recovery and Healing

The first few days

In the first few days you can expect:

• Red or pink eyes — sometimes quite bright red, particularly over the operated muscles
• Mild swelling of the eyelids
• Watery eyes or a small amount of bloody-tinged tearing
• A scratchy or gritty feeling, as if something is in the eye
• Some discomfort, usually controlled with simple painkillers

Eye drops or ointment, usually containing an antibiotic and sometimes a steroid, are prescribed for one to several weeks. Follow the schedule the team gives you.

Weeks one to six

Most children are back to school or nursery within a few days to a week, depending on how they feel. Redness improves steadily over two to four weeks, although a small amount may persist longer at the surgical site. The final position of the eyes settles over about six to twelve weeks; the alignment seen immediately after surgery is not always exactly what the long-term result will be.

Things to avoid

For the first two to four weeks, doctors typically advise:

• No swimming or putting the head under water
• Avoiding dusty or sandy environments
• Keeping young children from rubbing their eyes — gentle reminders, distraction, and cool compresses help
• Avoiding contact sports or rough play

Normal indoor activities, reading, watching screens in moderation, and going outside are fine once the child feels up to it. Glasses can usually be worn as soon as the child is comfortable.

Follow-up visits

The surgeon will usually want to see your child within the first week, then again at a few weeks, and then at longer intervals over the following months. These visits check healing, measure alignment, and assess whether glasses prescriptions, patching, or further treatment need to be adjusted.

Risks and Complications

Pediatric squint surgery is one of the more established operations in children’s eye care, and most children recover without significant problems. As with any surgery, there are potential risks, and your surgeon will discuss those most relevant to your child’s situation.

Common, usually short-lived effects

• Redness and swelling
• Mild discomfort or gritty feeling
• Watery eyes
• Temporary double vision, particularly in older children, as the brain adapts to the new alignment

Less common but important risks

• Undercorrection or overcorrection. The eyes may end up less straight than hoped, or too straight in the opposite direction. Either may improve as the eyes settle, or may require glasses, prisms, or further surgery to fine-tune.
• Need for additional surgery. Some children, particularly those with large or complex squints, need more than one operation over time. This is more likely with certain types of strabismus and is something the surgeon will discuss at the planning stage.
• Persistent double vision. Uncommon in younger children, but possible, especially in older children whose brains have adapted to the squint.
• Infection. Rare, and usually treatable with drops if it occurs. The team will tell you what signs to watch for.
• Slipped or lost muscle. Very rare, but a known complication where the muscle moves from its planned position after surgery. It usually requires a further operation to correct.
• Scarring or cyst formation on the conjunctiva. Usually mild and rarely needs treatment.
• Risks of general anaesthesia. Modern pediatric anaesthesia is very safe, but a small risk exists, which the anaesthetist will discuss with you.

Surgery is often one part of a longer journey of eye care rather than a one-off fix. What life looks like afterwards depends on the type of squint, the child’s age, and the state of their vision.

Vision and glasses

Surgery aligns the eyes; it does not change whether the child needs glasses. If your child wore glasses before surgery for a refractive error, they will almost always still need them afterwards. In some children with accommodative components to their squint, glasses are essential to maintaining the alignment achieved by surgery.

Amblyopia treatment

If amblyopia was present before surgery, patching or atropine drops will usually continue afterwards. The brain’s preference for one eye does not disappear just because the eyes are aligned, and continued treatment is often needed until the vision in each eye is balanced, typically up to around age seven or eight, sometimes longer.

Binocular vision development

One of the most important goals, particularly in younger children, is helping the brain learn to use both eyes together. Once the eyes are aligned, the brain has the opportunity to fuse the images from each eye and develop depth perception. Whether this happens depends on the child’s age, the type of squint, how long it was present before treatment, and the response to any further therapy.

Long-term follow-up

Most children continue to see the pediatric ophthalmologist at gradually increasing intervals: weeks, then months, then yearly. The eyes can shift over time, especially as the child grows. Some children remain perfectly aligned for life after one operation. Others develop a small return of the squint over the years and may need adjustments to glasses or a further operation in adolescence or adulthood.

Emotional and social wellbeing

Many parents notice changes in their child’s confidence, photographs, and interaction with peers after squint surgery. For children old enough to have been affected by comments or self-consciousness, this can be an important benefit. Honest conversation with your child about what surgery did and did not change is helpful.

Frequently Asked Questions

Is pediatric squint surgery painful?

The surgery itself is done under general anaesthesia, so your child does not feel anything during the operation. Afterwards, most children describe a sore, gritty, or scratchy feeling rather than sharp pain. Simple painkillers such as paracetamol or ibuprofen, as advised by the team, usually manage this well. Discomfort typically settles within a few days.

Will my child’s vision be better after surgery?

Surgery primarily aligns the eyes. It does not directly improve the sharpness of vision in either eye. If your child has a refractive error or amblyopia, those still need to be treated with glasses and/or patching. What surgery can improve is how the eyes work together, which supports depth perception and binocular vision when conditions are favourable.

Is the surgery cosmetic or medically necessary?

Squint surgery is both functional and reconstructive. It can support visual development, prevent or treat double vision, and remove abnormal head postures, all of which are medical benefits. It also improves appearance, which is recognised by major pediatric ophthalmology organisations as a legitimate part of treatment. For most children with significant strabismus, surgery is considered a medical procedure, not a purely cosmetic one.

Will my child need more than one operation?

Some children do. The chance depends on the type and size of the squint and the child’s response. Surgeons aim for the best possible result the first time, but the eyes can drift back partially or move in the opposite direction over time. Further surgery, if needed, is usually safe and often achieves stable alignment.

When is the best age for surgery?

There is no single answer. For infantile esotropia, many pediatric ophthalmologists favour surgery in the first year or two of life, because earlier alignment may better support the development of binocular vision. For other types of squint, doctors may prefer to try glasses, patching, or observation first and operate later if needed. Your child’s surgeon will base timing on the specific diagnosis, vision, and response to treatment.

Will my child still need to wear an eye patch after surgery?

If amblyopia is present, patching or atropine drops are usually continued after surgery, because aligning the eyes does not by itself cure the lazy eye. The patching plan is adjusted by the ophthalmologist based on how vision in each eye is developing.

Will there be a visible scar?

The incision is made on the conjunctiva, the clear tissue covering the white of the eye, not on the skin. There is no external scar. A small amount of redness or thickening at the surgical site may be visible in the first weeks but usually fades.

How soon can my child return to school and normal activities?

Many children return to school or nursery within a few days to a week, depending on how they feel. Reading and screen use are fine when comfortable. Swimming and contact sports are usually avoided for two to four weeks. The surgical team will give specific advice based on your child’s situation.

Can the squint come back?

Yes, in some children. The eyes can shift over months or years, especially as children grow. Regular follow-up allows any drift to be detected early and managed with glasses, prisms, or further surgery if needed.

Is there an alternative to general anaesthesia in children?

For young children, general anaesthesia is needed because they cannot stay still and cooperate during the operation. Older teenagers, in selected situations, may have surgery under local anaesthesia or with an adjustable suture technique, but this is uncommon in younger pediatric practice.

Conclusion

Pediatric squint surgery is a well-established part of children’s eye care. It does not operate on vision itself but adjusts the muscles around the eye so that the eyes can line up and work together. For many children with significant or persistent strabismus, surgery — together with glasses, patching, and regular follow-up — offers the best chance of good alignment, comfortable vision, and the development of binocular vision and depth perception.

The decision to proceed is rarely made in a single visit. It is usually the result of careful assessment of the type of squint, the child’s vision, and the response to non-surgical treatment. Timing, technique, and follow-up are all individualised. Going into the conversation with the pediatric ophthalmologist with clear questions — about which muscles are being operated on, what realistic results to expect, what will still need to be done with glasses or patching, and what the follow-up plan looks like — helps you and your child feel more prepared.

For most families, the experience of pediatric squint surgery, while understandably anxious, ends with a child whose eyes look and work more like they should — and with a longer-term plan for protecting and supporting their vision as they grow.