Eye Alignment and Movement Problems
Types and Causes of Eye Alignment and Movement Problems
Normally, six muscles control each eye and help them move smoothly in all directions. These muscles work together with cranial nerves, the brainstem, the cerebellum, and visual input from each eye to coordinate eye alignment and movement. Problems can arise from neurogenic causes affecting nerves or brain structures, restrictive problems limiting muscle movement, sensory issues such as poor vision in one eye, or primary muscle disorders.
Eye alignment and movement problems can develop at birth, appear during childhood, or start in adulthood. In young children with early-onset strabismus, the brain often adapts by ignoring the image from one eye or by making the child turn or tilt the head to reduce double vision. In adults, new misalignment more often causes persistent double vision because the adult brain typically cannot suppress or ignore the image from one eye.
Strabismus is the medical term for eyes that don't point in the same direction. We see several types in our practice, and each affects the eyes differently.
- Esotropia occurs when one or both eyes turn inward toward the nose
- Exotropia happens when one or both eyes drift outward
- Hypertropia means one eye sits higher than the other
- Hypotropia occurs when one eye sits lower than the other
- Intermittent strabismus comes and goes, often appearing when you are tired or ill
- Accommodative esotropia is often related to farsightedness and may improve with glasses
- Paralytic strabismus results from cranial nerve palsy and often causes sudden double vision
- Restrictive strabismus occurs when eye movement is limited, for example by thyroid eye disease or orbital fracture
Eye movement disorders affect how smoothly your eyes track objects or shift gaze between targets. Focusing, also called accommodation, is a separate process that changes the lens inside your eye to sharpen near vision. These conditions can make reading, driving, or following a conversation difficult.
- Nystagmus causes involuntary, rhythmic eye movements that may be side to side, up and down, or circular
- Convergence insufficiency makes it hard for your eyes to turn inward when looking at close objects
- Gaze palsies prevent your eyes from moving fully in one or more directions due to problems in the neurologic pathways that control eye movement
- Difficulty with quick eye movements, called saccades, affects the rapid shifts you use when reading or scanning a room
Many eye alignment and movement problems run in families. If your parents or siblings had strabismus or nystagmus, you or your children face a higher risk of developing similar conditions.
Premature birth, low birth weight, and developmental delays can also increase the likelihood of eye alignment issues. Some genetic syndromes affect the muscles or nerves that control eye movement, leading to problems that appear early in life.
Certain medical conditions can weaken the eye muscles or disrupt the nerve signals that control them. Thyroid eye disease, myasthenia gravis, and multiple sclerosis are examples of conditions that may lead to double vision or eye misalignment.
- Stroke or brain injury can damage the areas that coordinate eye movement
- Diabetes may affect the nerves that supply the eye muscles
- Tumors or aneurysms can press on nerves and prevent normal eye alignment
- Infections or inflammation in the brain or eye socket may cause sudden movement problems
Trauma to the head, face, or eye socket can damage muscles, nerves, or the bones that support the eyes. Car accidents, sports injuries, and falls are common causes of alignment problems that develop suddenly.
As we age, the tissues and muscles around the eyes may weaken or change. Some older adults develop double vision from age-related changes in the eye support tissues, such as decompensated phorias or sagging eye syndrome. Drooping eyelids can also occur and, when combined with double vision, may signal a neurologic condition that needs evaluation. Changes in the lens or glasses prescription can sometimes unmask or worsen a latent misalignment in some patients.
Recognizing Symptoms and When to Seek Care
Seeing two images of a single object is one of the most common signs of eye misalignment. The double vision may be constant or appear only when you look in certain directions or focus at specific distances.
Some people describe visual confusion rather than clear double vision. You might feel that objects seem to jump or that your vision is unstable, making it hard to judge distances or navigate safely.
If you experience new or uncontrolled double vision, you should avoid driving, operating machinery, or other hazardous activities until you have been evaluated by our eye doctor and the cause has been identified and managed.
You or others may notice that your eyes don't look straight or don't move together. One eye might wander inward, outward, upward, or downward, either all the time or only when you are tired.
- Eyes that shake or jiggle, even slightly, may indicate nystagmus
- One eye may not follow the other when you look left, right, up, or down
- Your eyes might appear crossed in photographs or when you look in the mirror
- Friends or family may comment that your eyes seem to drift or don't focus together
Many people with eye alignment or movement problems unconsciously tilt or turn their head to reduce double vision or see more clearly. This compensatory posture helps align the images from both eyes but can lead to neck pain and headaches over time.
If you find yourself holding your head at an unusual angle when reading, watching television, or doing close work, it may signal an underlying eye alignment issue. Children often develop a head tilt early in life without realizing it.
Young children may not be able to tell you they are seeing double or that their vision is blurry. Instead, they might close or cover one eye, lose their place while reading, or avoid activities that require good depth perception.
- Frequent squinting or rubbing of the eyes
- Poor performance in school or difficulty with hand-eye coordination
- Bumping into objects or misjudging distances when reaching for things
- Sitting very close to the television or holding books close to the face
Some symptoms indicate a serious condition that needs immediate medical attention. Sudden double vision, eye misalignment that appears quickly, or vision changes that occur with other neurological symptoms should prompt same-day emergency evaluation and should never be ignored.
- Double vision that starts suddenly and does not go away
- Eye misalignment accompanied by severe headache, confusion, or difficulty speaking
- Double vision with new drooping eyelid or new unequal pupil size, which may signal a cranial nerve palsy
- Double vision with facial droop, arm or leg weakness, severe imbalance, or trouble walking
- Pupils that are different sizes or don't react to light
- Loss of vision, drooping eyelid, or eye pain along with movement problems
- Painful eye movement with fever or significant swelling around the eye, which may indicate orbital infection
- Any new eye symptoms after a head injury or trauma
How We Diagnose Eye Alignment and Movement Problems
We begin with a detailed review of your symptoms, medical history, and any medications you take. Understanding when your symptoms started, whether they are constant or intermittent, and what makes them better or worse helps us narrow down the cause.
We then check your vision with and without corrective lenses and look at the health of your eyes using special instruments. A full exam lets us rule out other conditions that might be causing or contributing to your alignment or movement problems. In children, we may perform cycloplegic refraction using dilating drops to obtain an accurate glasses prescription and check for amblyopia and depth perception. In adults with new double vision, we carefully examine the pupils and eyelids for patterns that suggest third nerve palsy, myasthenia gravis, or other neurologic conditions when clinically indicated.
The cover test is a simple but powerful tool we use to detect even subtle eye misalignment. We ask you to focus on a target while we cover and uncover each eye, watching how your eyes move to maintain fixation.
We may also use prisms, which are special lenses that bend light, to measure the exact amount of misalignment. These measurements help us determine the best treatment approach and track changes over time.
We evaluate how well your eyes follow a moving object, shift between targets, and work together when focusing at different distances. These tests reveal problems with the muscles or nerves that control eye movement.
- Smooth pursuit testing checks if your eyes can follow a slowly moving target without jerking
- Saccade testing measures the accuracy of quick eye movements between two points
- Convergence testing assesses how well your eyes turn inward to focus on near objects
- Testing eye movements in all directions, called versions, evaluates whether both eyes move equally in all directions
If we suspect an underlying medical or neurological cause for your eye alignment or movement problem, we may recommend imaging studies such as MRI or CT scans. These tests help us see the structures around the eyes, the eye muscles, and the brain areas that control eye movement. Acute double vision, especially if painful, pupil-involving, or accompanied by neurologic symptoms, often warrants urgent imaging and emergency evaluation rather than routine outpatient scheduling.
We often work closely with neurologists, neurosurgeons, endocrinologists, or other specialists to ensure you receive comprehensive care. Coordinating with your other doctors helps us address both your eye symptoms and any underlying health conditions.
Treatment Approaches for Eye Alignment and Movement Problems
Correcting your refractive error with glasses or contact lenses can sometimes reduce or eliminate eye alignment problems, especially in children. In other cases, we may prescribe glasses with special prism lenses that bend light and help align the images your brain receives from each eye.
Prisms can be helpful for small to moderate amounts of misalignment and may improve or eliminate double vision without surgery. We adjust the prism strength as needed during follow-up visits to ensure you remain comfortable and see clearly. Prisms may not work well for large or highly variable deviations, and some patients experience image distortion or blurring with higher prism strengths. Temporary stick-on Fresnel prisms can be used short-term while we monitor your alignment or plan further treatment.
In children, reduced vision in one eye, called amblyopia or lazy eye, often develops alongside strabismus. Treating amblyopia is critical to preserve sight and often requires wearing glasses full-time, patching the stronger eye, or using atropine eye drops to blur the vision in the stronger eye temporarily. The brain is most responsive to amblyopia treatment during early childhood, so starting treatment promptly and following the plan consistently gives your child the best chance for improvement.
- Wearing prescribed glasses every day to correct farsightedness, nearsightedness, or astigmatism
- Patching the stronger eye for a set number of hours each day to strengthen the weaker eye
- Using atropine drops in the stronger eye as an alternative to patching in some cases
- Regular follow-up visits to monitor progress and adjust the treatment plan
- Understanding that treatment works best when started early and followed consistently
Vision therapy is a structured program of eye exercises and activities designed to improve how your eyes work together. This approach is most strongly supported by evidence for convergence insufficiency and may be used as an adjunct in selected cases of intermittent strabismus. It is not a substitute for treating amblyopia or for managing large, constant deviations, which typically require other treatments.
- Exercises to strengthen the muscles that turn your eyes inward for reading
- Activities to improve eye coordination and smooth tracking movements
- Training to help your brain merge the images from both eyes more efficiently
- Home exercises you practice between office visits to reinforce progress
If your symptoms worsen or you develop new double vision during vision therapy, contact our office so we can reassess your treatment plan.
In select cases directed by a specialist, we may recommend injections of botulinum toxin into one or more eye muscles to temporarily weaken them. This treatment can help manage certain types of strabismus or address misalignment after a stroke or nerve injury. Use of botulinum toxin for nystagmus is limited to specific scenarios, is not a routine treatment, and results can be variable.
The effects typically last several months, and repeat injections may be needed. This approach is often considered when glasses, prisms, or vision therapy have not provided enough improvement, or as a temporary measure before surgery. Potential adverse effects and limitations include the following.
- Temporary drooping of the eyelid
- Vertical eye deviation or new misalignment
- Dry eye or exposure symptoms
- Need for repeat treatment as effects wear off
- Variable benefit depending on the condition being treated
Strabismus surgery adjusts the position or tension of the eye muscles to improve alignment. We may tighten, loosen, or reposition one or more muscles on one or both eyes, depending on the type and severity of misalignment. The goals of surgery are to improve eye alignment, reduce or eliminate double vision, and restore a more normal appearance. However, perfect alignment and full depth perception are not guaranteed, and outcomes vary depending on the type of strabismus, age of onset, and visual development.
Surgery is usually performed on an outpatient basis. Some people need more than one procedure to achieve the best result, and glasses or prisms may still be needed after surgery. Improvement in depth perception depends on the age when the problem started and whether both eyes developed normal vision during childhood.
As with any surgery, strabismus surgery carries certain risks and considerations.
- Under-correction or over-correction of the eye alignment
- Need for additional surgery to refine the result
- Infection or bleeding, though these are rare
- Scarring of the eye muscles or surrounding tissues
- Persistent double vision or new double vision in certain gaze positions
- Anesthesia risks, which we review with you before the procedure
When a medical or neurological condition is causing your eye alignment or movement problem, treating that underlying issue is essential. Managing thyroid disease, controlling blood sugar in diabetes, or addressing myasthenia gravis can lead to improvement in your eye symptoms.
- Medications to manage thyroid eye disease or autoimmune conditions
- Blood sugar control to prevent further nerve damage in diabetic eye muscle palsy
- Treatment of infections, inflammation, or tumors affecting the eye or brain
- Rehabilitation after stroke or brain injury to help the visual system recover
Living with Eye Alignment and Movement Problems
Many people adapt to their eye alignment or movement problems and continue with most activities. Simple strategies can make daily tasks easier and reduce eye strain or discomfort.
- Use good lighting when reading or doing close work to reduce visual fatigue
- Take frequent breaks during tasks that require sustained focus or tracking
- Adjust the position of your computer screen or reading material to minimize double vision
- Wear your prescribed glasses or prisms consistently as our eye doctor recommends
Problems with depth perception or double vision can increase your risk of tripping, bumping into objects, or misjudging steps and curbs. Taking extra precautions helps keep you safe at home and when you are out.
Move slowly in unfamiliar environments and use handrails on stairs. Remove clutter and tripping hazards from walkways, and make sure all areas of your home are well lit, especially at night.
If you have eye muscle surgery, you may experience redness, soreness, and swelling for one to two weeks. Most people return to normal activities within a few days, though we usually recommend avoiding heavy lifting and strenuous exercise for a short period. You should also avoid swimming and rubbing your eyes during the initial healing period, as directed by your surgeon.
Contact our office right away if you experience any of the following after surgery or treatment.
- Worsening pain that does not improve with prescribed medication
- Sudden decrease in vision
- Increasing redness or swelling around the eye
- Discharge from the eye or fever
We schedule follow-up visits to monitor your alignment and make any needed adjustments to your glasses or prisms. Recovery from vision therapy or treatment of an underlying medical cause may take longer, and we work with you to set realistic goals and track your progress.
Eye alignment and movement problems can change over time, especially in children as they grow or in adults with progressive neurological conditions. Regular eye exams help us detect changes early and adjust your treatment plan as needed.
Contact our office if you notice new symptoms, worsening double vision, or changes in how your eyes look or move. Prompt evaluation allows us to address problems before they become more difficult to manage.
Frequently Asked Questions
In some infants, a small amount of eye turning may resolve as the visual system matures, but most cases of true strabismus do not go away without treatment. Waiting too long to address misalignment in children can lead to permanent vision loss in one eye, a condition called amblyopia.
Not everyone with eye misalignment experiences double vision. The brain sometimes learns to ignore the image from one eye, especially if the problem started in childhood, which prevents double vision but can reduce depth perception.
Binocular double vision occurs only when both eyes are open and goes away when you cover one eye. It is caused by eye misalignment and often signals a problem with the eye muscles or the nerves that control them. Monocular double vision persists even when you cover the good eye and is usually caused by a problem in one eye, such as a cataract, corneal irregularity, or lens issue. Binocular double vision is more likely to indicate a neurologic or muscular condition that needs prompt evaluation.
While many eye movement problems are isolated and not linked to other health issues, sudden changes or symptoms that appear with headaches, weakness, or numbness can signal stroke, aneurysm, or other serious conditions. We evaluate all new or rapidly changing symptoms carefully to rule out urgent causes.
Yes, adults can develop eye misalignment or movement problems due to diabetes, thyroid disease, stroke, trauma, or other conditions. Adult-onset double vision almost always needs evaluation to identify the underlying cause.
Vision therapy works best for specific conditions like convergence insufficiency and some forms of intermittent strabismus. It is less effective for constant large-angle misalignment or problems caused by nerve damage, which may require surgery or other treatments.
Strabismus surgery is primarily functional, with goals that include controlling double vision, restoring or expanding the field of single vision, correcting abnormal head posture, and improving how the eyes work together. Cosmetic improvement in eye appearance is often a secondary benefit. Many insurance plans recognize the functional nature of strabismus surgery when specific criteria are met.
Getting Help for Eye Alignment and Movement Problems
If you or your child has symptoms of eye misalignment or movement problems, we encourage you to schedule a comprehensive eye exam. Early diagnosis and treatment can improve vision, prevent complications, and help you feel more comfortable and confident in your daily life.