Pediatric Strabismus: Diagnosis and Treatment
Understanding Pediatric Strabismus
Strabismus, commonly called crossed eyes or misaligned eyes, is one of the most frequent eye conditions diagnosed in childhood. According to the American Association for Pediatric Ophthalmology and Strabismus (AAPOS), strabismus affects approximately 4 percent of children in the United States. When a child's eyes do not work together to focus on the same object, it can affect depth perception, visual development, and even self-confidence. At Greenwich Ophthalmology Associates, our pediatric ophthalmologists evaluate children of all ages for eye alignment concerns and provide a full range of nonsurgical and surgical treatment options. Early detection gives your child the best opportunity for healthy, coordinated vision, and understanding the condition is an important first step for every parent.
Each eye is controlled by six extraocular muscles that work in coordination with the brain to direct both eyes at the same target. When these muscles function properly, the brain receives matching images from each eye and merges them into a single, three-dimensional picture. In strabismus, a disruption in muscle control or nerve signaling causes one eye to deviate from the shared focal point.
Types of Strabismus
Strabismus is classified by the direction of the misaligned eye. Esotropia refers to the eye turning inward toward the nose, often appearing as crossed eyes, and is the most common type seen in children. Exotropia occurs when the eye drifts outward, sometimes called wall-eyed. Both conditions can affect one eye consistently or alternate between eyes.
In addition to horizontal deviations, some children develop hypertropia, where the eye turns upward, or hypotropia, where the eye turns downward. These vertical misalignments may occur in combination with horizontal deviations and often require careful evaluation to determine the underlying cause.
Some children have a constant misalignment that is present at all times, while others experience intermittent strabismus that only appears when they are tired, ill, or focusing at a particular distance. Intermittent exotropia, for example, may show up mainly when a child looks at distant objects or daydreams. Both forms benefit from professional evaluation because even occasional misalignment can interfere with the development of binocular vision.
Infants with a wide, flat nasal bridge or prominent skin folds between the nose and eyelids can appear to have crossed eyes even though their alignment is normal. This cosmetic illusion is called pseudostrabismus. Our pediatric ophthalmologists can quickly distinguish pseudostrabismus from true strabismus during a comprehensive eye examination, giving parents peace of mind or guiding them toward appropriate treatment.
What Causes Strabismus in Children
Strabismus can develop for a variety of reasons, and in many children more than one factor contributes to the misalignment. The brain must send precise signals to the six muscles around each eye to keep both eyes aligned. Any condition that disrupts these signals, such as a cranial nerve palsy or a developmental abnormality of the eye muscles, can lead to strabismus. Conditions like cerebral palsy and Down syndrome carry a higher likelihood of eye misalignment because they affect the neurological pathways that coordinate eye movement. Children with these conditions benefit from early referral to a pediatric ophthalmologist for ongoing vision monitoring.
Uncorrected farsightedness (hyperopia) is one of the most common triggers for accommodative esotropia, a form of inward-turning strabismus. When a farsighted child strains to focus, the extra effort can pull one eye inward. Prescribing the correct glasses often partially or fully corrects this type of misalignment without the need for surgery. Additionally, children who have a parent or sibling with strabismus are at greater risk for developing the condition themselves.
Babies born prematurely or with low birth weight have a higher incidence of strabismus. Other associated conditions include thyroid eye disease, certain orbital tumors, and previous eye surgery or trauma. In some cases, no identifiable cause is found, and the strabismus is considered idiopathic.
Signs and Symptoms of Pediatric Strabismus
Recognizing strabismus early is essential because the visual system is most adaptable during the first several years of life. The most obvious sign is an eye that appears to point in a different direction from the other. In young infants, occasional wandering of the eyes is normal during the first few months, but any persistent or consistent misalignment after three to four months of age warrants evaluation. Parents sometimes first notice the misalignment in photographs where the light reflex appears off-center in one eye.
Some children unconsciously tilt their head or turn their face to compensate for the misalignment. This posture allows them to use both eyes together more comfortably by finding a gaze position where the deviation is smallest. A consistent head tilt, especially in a child with no known neck issues, should prompt an eye alignment assessment. Children with strabismus may also squint or close one eye in bright sunlight or when trying to focus.
Because strabismus prevents the brain from combining images from both eyes effectively, children may have difficulty judging distances. Parents might notice clumsiness, trouble catching a ball, or hesitation on stairs. Young children rarely complain of double vision directly because the brain quickly learns to suppress the image from the misaligned eye, which can lead to amblyopia if left untreated.
How Pediatric Strabismus Is Diagnosed
A thorough evaluation by a fellowship-trained pediatric ophthalmologist is the most reliable way to confirm strabismus and identify its underlying cause. The cover test is a cornerstone of strabismus evaluation. The examiner covers one eye while the child focuses on a target and watches for movement in the uncovered eye. In very young or less cooperative children, the Hirschberg test provides a quick assessment by comparing the position of the light reflection on each cornea.
Special eye drops are used to temporarily relax the focusing muscles so that the full degree of any refractive error can be measured. This step is critical in children with esotropia because uncorrected hyperopia may be driving the misalignment. Identifying the accurate prescription helps our pediatric ophthalmologists determine whether glasses alone can reduce or eliminate the deviation.
Depending on the child's age and cooperation, additional tests assess how well the two eyes work together. Stereopsis (depth perception) testing measures the brain's ability to fuse images from both eyes. Suppression testing checks whether the brain has begun ignoring the input from the deviating eye, which is a warning sign for developing amblyopia.
The examiner evaluates each eye's range of motion in all directions of gaze to determine whether the misalignment is the same in every position (comitant) or changes depending on where the child looks (incomitant). Incomitant patterns often indicate a specific muscle weakness or nerve palsy and help guide surgical planning when intervention is needed.
Treatment Options for Pediatric Strabismus
Treatment aims to align the eyes, restore or preserve binocular vision, and prevent or reverse amblyopia. For children whose strabismus is driven wholly or partly by a refractive error, properly prescribed glasses are often the first line of treatment. In accommodative esotropia, glasses that correct farsightedness reduce the need for the extra focusing effort that pulls the eye inward. Some children achieve full alignment with glasses alone.
When strabismus has led to amblyopia in the deviating eye, strengthening that eye's visual pathway is essential before or alongside alignment treatment. Patching the stronger eye for a prescribed number of hours each day forces the weaker eye to work harder, gradually improving its visual acuity. Atropine drops, which blur the vision in the stronger eye, serve as an alternative for children who resist wearing a patch.
Prism lenses bend light before it enters the eye, compensating for small misalignments and reducing or eliminating double vision. They can be ground into eyeglasses or applied as temporary press-on (Fresnel) prisms. Prisms are most commonly used for small, stable deviations, as a bridge before surgery, or for children who are not surgical candidates.
When glasses and other conservative treatments do not achieve adequate alignment, surgery on the eye muscles is often recommended. The procedure involves tightening (resecting) or loosening (recessing) one or more extraocular muscles to reposition the eye. Strabismus surgery is performed under general anesthesia in children and is typically an outpatient procedure. Recovery is generally quick, with most children returning to normal activities within a few days, though mild redness and discomfort may last one to two weeks.
Frequently Asked Questions
Strabismus itself does not damage the eye, but the brain may respond to the misalignment by suppressing vision in the deviating eye. Over time, this suppression can cause amblyopia (sometimes called lazy eye), which results in reduced visual acuity that becomes harder to reverse as a child grows older. Starting treatment during the early years, when the visual system is still developing, offers the strongest chance of preserving full vision in both eyes.
Risk factors include a family history of strabismus or amblyopia, premature birth, low birth weight, significant uncorrected refractive error, and neurological conditions such as cerebral palsy or Down syndrome. Children with pediatric glaucoma or other complex eye conditions may also have a higher incidence. Because strabismus can develop at any point during childhood, routine pediatric eye examinations remain important even in children with no apparent risk factors.
Most children respond well to treatment, especially when it begins early. Many achieve good eye alignment and functional binocular vision. In some cases, the deviation may recur or a residual small angle of misalignment may persist, requiring additional glasses adjustment, prism correction, or a second surgical procedure. Ongoing monitoring throughout childhood helps catch any changes before they affect visual development.
Strabismus cannot be prevented through lifestyle changes, but early detection makes a significant difference in outcomes. Parents should watch for signs of eye misalignment, head tilting, or squinting and schedule an eye examination if these are observed. At home, following the prescribed patching or glasses schedule consistently is one of the most impactful steps a parent can take to support treatment success.
The American Academy of Ophthalmology recommends that all children receive vision screening during well-child visits and a comprehensive eye assessment by age three to five. However, if a parent, pediatrician, or family member notices a possible eye turn at any age, a prompt evaluation is appropriate. Newborns with constant eye misalignment beyond three to four months of age should be seen sooner rather than later, as some forms of infantile strabismus benefit from early surgical correction.
Most children experience mild discomfort, redness, and some swelling for the first few days after surgery. Over-the-counter pain relievers and prescribed eye drops help manage these symptoms. Most children can return to school within a few days to a week, though contact sports and swimming are typically restricted for two to three weeks. Follow-up appointments allow the surgeon to assess healing and determine whether the alignment goal has been achieved.
Expert Care for Your Child's Eye Alignment
If you have noticed your child's eyes crossing, drifting, or not tracking together, a comprehensive evaluation can provide clear answers and a personalized treatment plan. Our pediatric ophthalmologists at Greenwich Ophthalmology Associates bring fellowship-level training and decades of combined experience to every young patient they see.
We are here to guide your family through diagnosis and treatment with expert care tailored to your child's needs, and we welcome you to schedule an appointment at your convenience. Early intervention gives your child the best chance at developing healthy, coordinated vision that will serve them throughout their lifetime.
What our Patients say
4.8
Reviews
(3547)