Strabismus Surgery Repositions Eye Muscles to Align the Eyes

Have you ever noticed that one eye drifts inward or outward while the other looks straight ahead? Or that you tilt your head without meaning to, just to see one clear image? Surgery for misaligned eyes — also called strabismus or eye muscle surgery — repositions one or more of the muscles that move the eye so both eyes point in the same direction.

It may reduce double vision, improve an abnormal head posture and enhance appearance. What it does for vision itself depends on what caused the misalignment in the first place.

Overview: What Is Misaligned Eye Surgery?

In strabismus, the eyes do not look in the same direction at the same time, and this surgery is one way to treat it. The surgeon works on the muscles attached to the outside of the eye, weakening, strengthening or repositioning selected muscles so the eyes can align more effectively. It is commonly called strabismus surgery or eye muscle surgery.

The procedure can be performed in childhood or adulthood. Its goals may include improving the position of the eyes, reducing double vision, relieving compensatory head tilting or turning, and improving confidence about eye appearance. The surgical plan is individualized because the direction, size and cause of the misalignment differ from person to person.

Eye alignment surgery does not correct every cause of reduced vision. For example, if one eye has longstanding amblyopia, retinal disease or optic nerve damage, muscle surgery cannot restore vision lost from that condition. Even so, straighter eyes can still make a real difference to how you function day to day and how you feel around other people.

How Eye Muscle Surgery Works and Who May Benefit

Six muscles move each eye. In strabismus, the balance between these muscles or the nerve signals controlling them may be altered. During surgery, an ophthalmologist with expertise in strabismus changes the tension or attachment point of one or more muscles. A recession moves a muscle farther back to reduce its pull, while a resection or plication strengthens its effect. Some adults may be offered adjustable sutures, which allow fine adjustment of alignment shortly after surgery.

Potential candidates include children or adults with an inward, outward, upward or downward eye turn; persistent or troubling double vision; a compensatory head posture; or eye misalignment affecting daily life. Surgery may be recommended after a full eye examination and measurement of alignment, sometimes following a trial of glasses, prism lenses, patching in selected children or treatment of an underlying eye condition.

Misaligned eyes after cataract surgery can occur when cataract removal reveals a pre-existing tendency for the eyes to drift, changes how the brain uses visual input, or is associated with another eye-muscle or nerve problem. Misalignment after cataract surgery is not automatically an indication for surgery. An ophthalmologist should first determine whether the change is temporary, related to the prescription difference between the eyes, or due to a condition requiring other care.

Assessment and Planning Before Surgery

Planning begins with a detailed eye examination. The ophthalmologist checks vision in each eye, refraction for glasses needs, eye movements, eyelid position and the size of the deviation at near and distance. Measurements may be repeated on different visits because alignment can vary with fatigue, focus and general health.

For adults with new-onset double vision or a sudden eye turn, the assessment may include evaluation for neurologic, thyroid-related, muscle or orbital causes. Blood tests, imaging or consultation with another specialist may be appropriate when symptoms or examination findings suggest an underlying condition. Taking this time up front means the surgery targets the real problem, not just the symptom.

Before the procedure, patients should provide a full medication list and report allergies, bleeding disorders, sleep apnea, diabetes or prior eye surgery. The surgical and anesthesia teams give individualized instructions about eating, drinking and medicines before surgery. If you take blood thinners, ask when to stop or continue them — please don’t adjust them yourself.

Step by Step: What Happens During the Procedure

Strabismus surgery is usually an outpatient procedure, meaning the person returns home the same day. Children commonly receive general anesthesia. Adults may receive general anesthesia or, in selected settings, local anesthesia with sedation. The approach depends on the patient’s age, health, planned operation and preferences.

The surgeon makes a small incision in the conjunctiva, the thin clear tissue covering the white part of the eye. The eye itself is not removed, and surgery does not involve the retina or optic nerve. The surgeon identifies the planned muscle or muscles and moves, shortens, folds or reattaches them as needed to change their action.

Absorbable stitches are often used. The conjunctiva is then repositioned, and the eye may be treated with antibiotic ointment or drops. Surgery length varies with the number of muscles and complexity of the alignment, but many procedures take less than a few hours from preparation through recovery. Ask your ophthalmologist to walk you through the plan for your own eye movement pattern before the day of surgery.

Recovery Timeline and What to Avoid After Strabismus Surgery

After surgery, the eye commonly feels scratchy, watery or mildly painful, and the white of the eye is usually red. Temporary blurred vision, light sensitivity, eyelid swelling and a small amount of blood-tinged tearing can occur. These effects typically improve over days, while redness may take several weeks to fade completely.

In the first day or two, rest and prescribed eye drops or ointment are usually recommended. Many people can resume light daily activities within a few days, depending on comfort and their clinician’s advice. Follow-up appointments are important because the eye position, healing tissues and vision need to be checked.

What can you not do after strabismus surgery? Patients are generally advised not to rub or press on the eye and to avoid swimming, hot tubs and potentially contaminated water until the surgeon confirms healing. Contact sports, heavy exertion and activities that increase the chance of eye injury may need to be postponed for a short period. Eye makeup, driving and return to work or school should follow the clinician’s specific guidance, especially if vision is blurred or double.

• Use medicines exactly as prescribed and wash hands before applying drops.
• Protect the eye from dust, accidental rubbing and trauma.
• Attend scheduled reviews, even if the eye seems to be healing well.
• Contact the surgical team promptly if symptoms worsen rather than improve.

Benefits, Limits and Possible Risks

The main benefit of misaligned eye surgery is better eye alignment. For some people, this reduces double vision, improves the ability to maintain eye contact or helps them hold their head in a more comfortable position. In children, alignment may support normal visual development alongside other treatments. In adults, treatment can improve everyday function and quality of life even when the misalignment has been present for many years.

Can you see better after strabismus surgery? Some people see more comfortably because double vision decreases or the eyes work together more effectively. However, the surgery does not directly correct refractive error, cataract, retinal disease or optic nerve disease. Glasses or contact lenses may still be needed, and vision improvement cannot be predicted without understanding the cause of reduced vision.

Risks are uncommon but include infection, bleeding, scarring, persistent redness, allergic reaction to medicines or anesthesia, and temporary or persistent double vision. The alignment may be undercorrected or overcorrected, and some people need glasses, prism treatment, botulinum toxin treatment or another operation. Rarely, serious complications can affect vision; urgent evaluation is important for severe pain, rapidly worsening vision or marked swelling.

Is Adult Strabismus Surgery Worth It?

Whether adult strabismus surgery is worth it depends on the person’s symptoms, goals, examination findings and likelihood of a stable result. Adults may benefit when misalignment causes double vision, eye strain, difficulty with certain tasks, abnormal head posture or distress about appearance. Being older is not, on its own, a reason to skip an assessment or rule out treatment.

The decision is best made after discussion with a strabismus specialist. The clinician can explain whether the deviation is likely to respond to surgery, whether adjustable sutures are appropriate, and whether glasses or prisms could help first. In some cases, the safest or most useful approach is observation or non-surgical management.

How painful is strabismus surgery? Pain during the operation is prevented with anesthesia. Afterwards, most people describe irritation, grittiness, soreness or a pulling sensation rather than severe pain. Prescribed or clinician-approved pain relief, cool compresses when recommended, and rest can help; severe or increasing pain should be reported promptly.

When to Seek Medical Care

Arrange an eye examination for a persistent eye turn, recurring double vision, new head tilting, difficulty focusing or concern about eye appearance. Children with suspected eye misalignment should be assessed promptly, as early identification of vision problems can be important for visual development. If you are an adult and one eye has started to turn, don’t assume it’s only a cosmetic matter.

Seek urgent medical attention for sudden double vision, sudden eye misalignment, vision loss, severe headache, weakness, facial drooping, difficulty speaking, severe eye pain, fever or significant swelling around the eye. These symptoms can sometimes indicate a problem beyond the eye muscles and need timely evaluation.

After surgery, contact the treating team promptly for worsening redness, discharge, fever, increasing pain, a marked decline in vision, persistent vomiting or other concerning symptoms. Acıbadem Health Point’s multidisciplinary specialists and JCI-accredited hospitals assess and treat strabismus and related eye-movement concerns for international patients.

Frequently asked questions