What is a squint?
A squint, medically called strabismus, occurs when the eyes do not point in the same direction at the same time. One eye may turn inward, outward, upward or downward, and the direction can be constant or intermittent. It can begin in infancy or childhood, but adults can also develop new eye misalignment. The eyes may alternate which one turns, or one eye may be affected more consistently. A squint is not simply a cosmetic concern because alignment can affect how the brain uses vision from each eye.
Some children with a squint have double vision; young children may not describe it and may instead close one eye, tilt the head or avoid certain tasks. Adults with new misalignment may experience double vision, eye strain or difficulty judging depth. A photograph can sometimes show an apparent turn, but camera angle and reflection can be misleading. An eye examination is needed to identify true misalignment, determine whether it is related to focusing or another health issue and check vision in each eye.
Why timely assessment matters
In childhood, the visual system is developing. If the brain consistently receives a different or blurred image from one eye, it may begin to favour the other eye. This can lead to amblyopia, often called lazy eye, which is reduced vision that develops because normal visual development has been disrupted. A child may not complain because the stronger eye compensates. Early assessment can identify whether glasses, amblyopia treatment or alignment care is needed while visual development is still underway.
A new squint in an adult also deserves prompt attention, particularly if it begins suddenly or comes with double vision, headache, drooping eyelid, weakness or other neurological symptoms. Sudden double vision with severe headache, weakness, facial droop, trouble speaking or imbalance requires emergency medical assessment. Do not assume new adult misalignment is harmless or only due to tiredness. The timing and associated symptoms can help clinicians decide how urgently to investigate the cause.
What happens during an eye alignment assessment
The clinician asks when the turn was first noticed, whether it is present all the time, which eye turns and whether the child has headaches, closes one eye or tilts the head. Testing may include visual acuity in each eye, spectacle prescription, pupil responses, eye movements, alignment measurements and examination of the front and back of the eye. Children may be tested with age-appropriate pictures, symbols or lights. A dilated refraction can help identify focusing errors that contribute to some forms of squint.
Bring previous glasses, school or screening reports and any family history of squint or amblyopia. If the turn appears only occasionally, a short video may help show what you have noticed, but it does not replace an examination. Tell the clinician whether the child avoids reading, loses their place, sits close to a screen or complains of blur. A good evaluation checks both alignment and vision; treating the visible eye turn alone may miss reduced vision in one eye.
Treatment options depend on the cause
Glasses may improve alignment when focusing effort contributes to the squint. They can also correct refractive error and support clear vision. If amblyopia is present, the clinician may recommend patching the stronger eye or another structured treatment to encourage use of the weaker eye. Some patients may benefit from prism lenses or carefully prescribed exercises for particular conditions. These approaches have different purposes, so ask whether the goal is clearer vision, better alignment, treatment of amblyopia or relief of double vision.
Surgery to adjust the eye muscles may be considered when misalignment persists or causes functional problems despite other treatment. Surgery changes the position or pull of muscles; it does not directly make a blurred eye see clearly and does not replace glasses if they are needed. Some people require more than one treatment or an additional operation. The eye specialist should discuss expected alignment, risks, possible under- or over-correction, anaesthesia and follow-up. No treatment should be chosen solely from an online description or a photograph.
Squint surgery: what families should know
If surgery is recommended, ask which muscles will be adjusted and why, whether one or both eyes are involved, what anaesthesia is planned and how long the child or adult may need away from usual activities. The exact technique depends on the pattern of misalignment and previous treatment. The operation is intended to improve eye position or binocular function where possible; it cannot guarantee perfect alignment in every gaze or eliminate the need for spectacles. The surgical team will explain preparation and consent.
After surgery, temporary redness, soreness, watering or a gritty feeling may occur. Use any prescribed drops and attend follow-up. Contact the team promptly for severe or worsening pain, sudden decline in vision, increasing swelling, discharge or other symptoms in the written instructions. Do not let a child rub the eye, and follow advice about school, sports, swimming and screen use. The care plan may continue after alignment surgery, especially if the child also needs glasses or amblyopia treatment.
Supporting a child through treatment
Children do best when care is explained without blame. A squint is not caused by poor effort, laziness or a child choosing to look in a certain direction. Let the child know that glasses or patching are tools to help the eyes and brain work together. Coordinate with teachers when treatment affects school activities, but protect the child’s privacy and confidence. If patching is recommended, ask how many hours, which eye, what tasks to do during treatment and how progress will be checked.
Do not increase patching time, use another child’s glasses or stop treatment because the eyes look straighter. The clinician measures vision and alignment to decide whether the plan is working. Keep appointments, bring the glasses and share practical challenges such as skin irritation, teasing or difficulty keeping a patch on. The team may be able to adjust the approach. Encouragement and a predictable routine are more helpful than criticism or threats, and the child’s comfort is part of successful care.
Possible risks and realistic expectations
The course of a squint varies. Some turns respond to glasses; others need amblyopia treatment, surgery or ongoing observation. Even after alignment improves, the child may need glasses or continued vision therapy prescribed by the clinician. Surgery has risks, including infection, bleeding, scarring, double vision, under-correction, over-correction or the need for another procedure. The particular risk depends on health, type of squint and prior treatment. Ask the surgeon to explain which outcomes are likely and which are uncertain.
A visible improvement in alignment does not always mean that both eyes have equal vision or normal depth perception. Conversely, some children develop strong visual function even if a small residual turn remains. Follow-up checks both eye position and vision development. Seek review sooner if the squint becomes more frequent, the child begins closing one eye, vision changes or symptoms of double vision appear. A realistic plan measures functional progress, not only how the eyes look in a single photograph.
Questions to ask at the consultation
Ask what type of squint is present, whether the vision differs between the eyes and whether glasses change the alignment. Is amblyopia present or at risk? What is the goal of the proposed treatment? If patching is recommended, how long each day and for how many weeks before review? If surgery is discussed, what can it improve, what might remain and could another procedure be needed? Ask what symptoms would make the appointment urgent.
For adults with new double vision, ask whether further medical or neurological tests are needed. For children, discuss school, patching routines, sports and how to help the child cooperate. Request written instructions and the next review date. If you are unsure about a recommended operation, ask for time to consider and clarify the alternatives. Informed families can make treatment easier to follow and can report problems before they affect vision development or daily activities.
Frequently asked questions
Will a child outgrow a squint?
Do not rely on waiting without assessment. Some alignment patterns change, but a squint can affect vision development and should be evaluated.
Does squint surgery cure lazy eye?
Surgery may improve alignment, but amblyopia often needs separate treatment such as glasses or patching.
Can glasses correct a squint?
For some types, glasses improve alignment by correcting focusing effort. The result depends on the cause and examination.
Is squint only a cosmetic issue?
No. It can affect visual development, binocular vision, depth perception or cause double vision.
When is new adult squint urgent?
Sudden double vision with neurological symptoms or severe headache requires emergency assessment. New adult misalignment should be promptly evaluated.
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