Pediatric Strabismus
What Is Pediatric Strabismus?
Strabismus can occur in several different forms depending on the direction of the eye turn. Esotropia happens when one eye turns inward toward the nose, while exotropia describes an outward turn away from the nose. Hypertropia refers to an upward turn, and hypotropia means a downward turn.
Some children experience constant strabismus, where the misalignment is always present. Others have intermittent strabismus that appears only when they are tired, sick, or focusing on near or distant objects. Understanding which type your child has helps us plan the best treatment approach.
When the eyes are not aligned, each eye sends a different image to the brain. In young children, the brain may learn to ignore the image from the turned eye to avoid seeing double. Over time, this suppression can lead to amblyopia, also known as lazy eye, in which vision can become reduced and may become permanent if not treated early.
Misaligned eyes also prevent the brain from combining images to create depth perception. Without proper treatment, some children with strabismus may struggle with tasks that require judging distances, such as catching a ball or navigating stairs safely, though many children develop compensations.
The visual system develops rapidly during the first several years of life. If strabismus is not treated during this critical window, the brain may suppress vision in one eye, leading to vision loss that can become permanent. Early intervention gives us the best chance to restore alignment and preserve normal vision development.
Treatment is most effective when started in early childhood, though older children and even adults can still benefit from certain therapies. Routine eye exams during infancy and early childhood help us catch strabismus early, when outcomes are best.
Recognizing the Signs in Your Child
The most obvious sign of strabismus is a visible misalignment of the eyes. You may notice that one eye points in a different direction while your child is looking at you or focusing on a toy. This turn may be constant or appear only some of the time.
- One eye turning inward or outward
- Eyes that do not move together smoothly
- A wandering eye that drifts when your child is daydreaming or tired
- Eyes that look misaligned in photographs, especially with flash
Keep in mind that eyes can appear crossed in photographs due to lighting, camera angle, or facial features such as a wide nasal bridge or prominent skin folds near the nose. These factors do not confirm true strabismus, but any concern about eye alignment warrants a professional exam.
Children with strabismus often develop behaviors to compensate for their misaligned eyes. They may tilt or turn their head to a specific angle to help the eyes line up better. Some children squint or close one eye, especially in bright sunlight, to eliminate the double vision or confusion created by misalignment.
These compensations can become habits that parents mistake for normal quirks. If you notice your child consistently tilting their head or shutting one eye during activities, schedule an eye exam to rule out strabismus.
Many cases of strabismus develop gradually, but sudden onset of eye misalignment in a child who previously had straight eyes can signal a serious problem. Seek immediate medical attention if your child develops sudden strabismus, especially if it is accompanied by headache, double vision, drowsiness, vomiting, trouble walking, eye pain, restricted eye movement, a droopy eyelid, unequal pupils, recent head or eye trauma, fever, a bulging eye, or new severe vision loss.
These symptoms may indicate a neurological or other serious condition that requires prompt evaluation. Do not wait for a routine appointment if you observe these warning signs.
What Causes Strabismus in Children?
Strabismus often runs in families, so children with a parent or sibling who has or had eye misalignment face a higher risk. Premature birth and low birth weight also increase the likelihood of developing strabismus. Babies born with certain genetic conditions or developmental disorders may have eye alignment problems from an early age.
In many cases, we cannot identify a single cause. The muscles that control eye movement may not develop evenly, or the nerves that signal the muscles may not coordinate properly. Understanding your family history helps us monitor at-risk children more closely.
Several health conditions can contribute to or worsen strabismus. Children with cerebral palsy, Down syndrome, hydrocephalus, brain tumors, or stroke may develop eye misalignment as part of their condition. Neurological problems that affect the nerves or muscles controlling the eyes can disrupt normal alignment.
- Cerebral palsy and other movement disorders
- Genetic syndromes affecting muscle or nerve function
- Brain injuries or tumors
- Conditions causing increased pressure inside the skull
Uncorrected vision problems, especially farsightedness, can lead to a type of strabismus called accommodative esotropia. When a child struggles to focus on nearby objects due to uncorrected farsightedness, the extra effort to see clearly can cause one eye to turn inward. This type of strabismus often appears between ages two and four.
Correcting the underlying refractive error with glasses can sometimes eliminate the eye turn completely. Even children who do not complain about blurry vision may benefit from a comprehensive eye exam to check for hidden focusing problems.
Strabismus can also develop when one eye has significantly reduced vision from a condition such as congenital cataract, retinal disease, or optic nerve problems. This is sometimes called sensory strabismus because the poor vision prevents the eye from maintaining proper alignment.
A large difference in refractive error between the two eyes, known as anisometropia, can also be associated with strabismus and amblyopia. Thorough examination and testing help us identify these underlying causes so we can address both the eye turn and any vision-limiting conditions.
How We Diagnose Strabismus
We begin by observing how your child's eyes move and align while they look at targets at different distances. Our eye doctor will ask about your child's medical history, birth history, and any developmental concerns. We also review family history of eye conditions and discuss any symptoms you have noticed at home.
The exam includes checking visual acuity in each eye, though young children who cannot read letters will be tested with age-appropriate methods such as pictures or visual tracking. We evaluate how well each eye sees and whether one eye is weaker than the other.
We use several tests to measure the degree and type of strabismus. The cover test involves covering and uncovering each eye while your child focuses on a target, allowing us to see which eye moves and in what direction. The alternate cover test reveals even subtle misalignments that may not be obvious during casual observation.
- Prism testing to measure the angle of deviation
- Evaluation of eye movements in all directions of gaze
- Assessment of how well the eyes work together as a team
- Observation of alignment at near and far distances
Because strabismus often leads to amblyopia, we carefully assess vision in each eye separately by covering one eye at a time. This allows us to measure the true visual acuity of each eye without interference from the fellow eye. We may use dilating drops, called cycloplegic drops, to temporarily relax the focusing muscles so we can measure refractive error accurately and examine the internal structures of the eye, including the retina and optic nerve.
We also test depth perception, which relies on both eyes working together to create a three-dimensional view of the world. Children with long-standing strabismus may have reduced or absent stereovision, though treatment can sometimes help the brain relearn this skill.
Treatment Options for Pediatric Strabismus
For children with accommodative esotropia or other refractive errors contributing to eye misalignment, prescription glasses may be the primary treatment. Correcting farsightedness, nearsightedness, or astigmatism reduces the focusing effort that triggers the eye turn. In some cases, glasses alone can restore normal alignment without the need for additional treatment. For children with a high accommodative convergence to accommodation ratio, bifocal lenses may be recommended to reduce eye turning when looking at near objects.
Your child will need to wear the glasses full-time for best results. We will monitor alignment closely during follow-up visits to determine whether the glasses are controlling the turn adequately or if additional treatment is needed.
When strabismus has caused one eye to become weaker, we may recommend patching the stronger eye for several hours each day. This occlusion therapy forces the brain to use and strengthen the weaker eye. The patching schedule depends on the severity of amblyopia and your child's age.
Consistency is critical to success. Many children need to patch for weeks or months to see improvement. We will provide tips to help your child tolerate the patch and make the treatment routine as smooth as possible.
For families who struggle with patching, atropine eye drops placed in the stronger eye offer an alternative. The drops temporarily blur near vision in that eye, encouraging the brain to rely on the weaker eye for close-up tasks. Atropine is a prescription medication, and the dosing schedule is individualized based on your child's age and the severity of amblyopia. Common regimens include daily dosing or weekend dosing, as prescribed by our eye doctor.
Side effects such as light sensitivity and difficulty with near tasks in the treated eye are usually mild and reversible. Because atropine is a prescription medication, follow the instructions carefully. Wash your hands before and after applying the drops, do not share the medication, and store it safely out of reach of children. Manage light sensitivity with a hat or sunglasses when outdoors.
- Call our office if your child develops severe eye redness, pain, or swelling
- Seek care if you notice signs of an allergic reaction such as rash or difficulty breathing
- Contact us if your child experiences rare systemic symptoms such as skin flushing, rapid heartbeat, unusual behavior, or severe headache
In select cases, prism lenses incorporated into eyeglasses can help reduce double vision or improve alignment for small-angle deviations or symptomatic patients. Prisms bend light before it enters the eye, helping the brain fuse images more easily. This approach is not appropriate for all types of strabismus and is typically reserved for specific situations.
Orthoptic exercises or vision therapy may be recommended for certain conditions such as convergence insufficiency, where the eyes have difficulty turning inward to focus on close objects. These exercises have a limited role for many types of constant childhood strabismus but can be helpful in select cases. For some children with intermittent exotropia or other intermittent deviations, observation with regular monitoring may be an appropriate initial approach, provided we watch closely for amblyopia and ensure alignment is not worsening. In some specialized centers, botulinum toxin injections into eye muscles are used as an alternative or adjunct to surgery in select scenarios.
When glasses and other treatments do not adequately align the eyes, we may recommend eye muscle surgery. During the procedure, our surgeon adjusts the position or tension of the muscles that control eye movement. The goal is to improve alignment and help both eyes work together more effectively.
- Surgery is typically performed as an outpatient procedure
- Your child will be under general anesthesia and will not feel pain during the operation
- Recovery usually takes a few days to a couple of weeks
- Multiple surgeries may be needed in some cases to achieve the best alignment
- Surgery improves alignment but does not always restore perfect depth perception if amblyopia is present
As with any surgery, there are risks. Possible complications include infection, bleeding, over-correction or under-correction requiring additional surgery, scarring, slipped or lost muscle, rare vision-threatening complications, and risks associated with general anesthesia. Our surgeon will discuss these risks with you in detail before the procedure.
After surgery, your child may experience redness, tearing, and mild discomfort, which are normal. We will prescribe eye drops or ointment and provide instructions about activity restrictions. Call our office immediately if your child develops worsening pain, marked swelling, pus-like discharge, fever, or decreased vision after surgery.
If strabismus is not treated during childhood, the misalignment and any associated amblyopia may become difficult to improve later. Adults with untreated childhood strabismus may experience cosmetic concerns, difficulty with depth perception, and challenges with certain occupations or activities. Vision lost to amblyopia during the critical period of early development is often more difficult to recover later in life, though some improvement may still be possible with appropriate therapy in older children and teens.
Even when treatment begins promptly, some children require ongoing management. We may recommend adjustments to glasses prescriptions, additional patching, or further surgery if alignment drifts over time. Long-term follow-up helps us catch and address problems early.
Supporting Your Child Through Treatment
Many young children resist wearing an eye patch at first. You can make the experience more positive by decorating patches with fun stickers, choosing colorful designs, or reading stories about characters who wear patches. Plan special activities during patching time, such as playing favorite games or watching a preferred show, to create positive associations.
Consistency and a calm, matter-of-fact attitude help children adjust to the routine. Praise your child for wearing the patch and avoid giving in to protests, as this can make future sessions even harder. Many children adapt within a week or two once patching becomes part of the daily schedule.
Successful treatment depends on following the plan we create together. Whether your child needs to wear glasses all day, patch for certain hours, or use eye drops on schedule, keeping to the routine is essential. Missing days or cutting sessions short can delay improvement and prolong the overall treatment period.
Regular follow-up appointments allow us to track progress, adjust the treatment plan as needed, and catch any new problems early. Bring your child in for scheduled visits even if everything seems to be going well, as some changes are subtle and only detectable during a professional exam.
You may notice that your child's eyes appear straighter, that the eye turn happens less often, or that your child performs better at tasks requiring hand-eye coordination. Improved vision in the weaker eye is another positive sign, though this may be harder to observe at home. We will measure these changes objectively during checkups.
- Contact us if the eye turn suddenly worsens or becomes constant
- Call if your child develops new symptoms such as double vision or headaches
- Reach out if your child cannot tolerate treatment due to pain or severe irritation
- Let us know if you have questions or concerns about the treatment plan
Frequently Asked Questions
Most children will not outgrow strabismus on their own. While newborns may have occasional eye crossing that resolves in the first few months of life, persistent or constant misalignment after four to six months of age usually requires treatment. Waiting and hoping the problem will disappear on its own risks permanent vision loss from amblyopia and missed opportunities for easier, more effective treatment.
Eyes can drift out of alignment again after surgery, especially in children who had large angles of misalignment or certain types of strabismus. Some children need a second surgery or additional treatments such as glasses or patching to maintain good alignment. Regular follow-up visits help us monitor for any changes and intervene promptly if the eyes begin to drift again.
Not every child with strabismus develops amblyopia, but the risk is significant if the condition is not treated. Intermittent strabismus or misalignment that alternates between eyes may be less likely to cause amblyopia than constant turning of one eye. Early treatment of both the misalignment and any resulting amblyopia gives the best chance of preserving full vision in both eyes.
Children with strabismus may not see the 3D effect in movies or certain video games because their eyes do not work together to create depth perception. Watching 3D content will not harm their eyes or worsen the strabismus. Regular screen time for entertainment or schoolwork is also safe, though it is still wise to follow general guidelines about balancing screen use with other activities.
Treatment duration varies widely depending on the type and severity of strabismus, the presence of amblyopia, and how well your child responds to therapy. Some children with accommodative esotropia see immediate improvement once they start wearing glasses. Patching for amblyopia may continue for several months to a year. Children who need surgery often require ongoing follow-up for years to ensure alignment remains stable as they grow.
Getting Help for Pediatric Strabismus
If you notice signs of eye misalignment in your child, schedule a comprehensive eye exam with our eye doctor. Early diagnosis and treatment offer the best outcomes for vision, alignment, and overall development. We will work with you and your child to create a personalized treatment plan and provide the support your family needs throughout the process.