Adult Strabismus
Understanding Eye Misalignment in Adults
Adult strabismus can present in many forms and for many reasons. Understanding what it looks like, what causes it, and what symptoms it produces helps you recognize when to seek care.
In strabismus, one eye turns in a direction different from the other. The turned eye may drift inward, outward, upward, or downward while the other eye looks straight ahead. The misalignment may be constant or may only appear when you are tired, ill, or focusing at certain distances.
You may notice that people look at the wrong eye when speaking with you, or that photos show your eyes pointing in different directions. In some cases, the deviation is subtle enough that only a formal eye exam reveals it.
Some adults have carried strabismus since childhood, either because it was never fully corrected or because it returned after earlier treatment. Others develop strabismus for the first time in adulthood.
Common causes of new-onset adult strabismus include:
- Stroke or brain injury affecting the nerves that control eye movement
- Diabetes, which can damage the small blood vessels supplying those nerves
- Thyroid eye disease, which causes the eye muscles to swell and stiffen
- Head trauma or orbital injury
- Sagging eye syndrome, an age-related condition in which weakened connective tissue allows the eye muscles to shift out of position
Identifying the cause is an important part of treatment planning, because some conditions require medical management alongside eye care.
Double vision, known medically as diplopia, is the most common symptom adults experience with strabismus. You may also notice eye strain, headaches, difficulty reading, reduced depth perception, or trouble judging distances.
Some adults develop habits to compensate for misalignment without realizing it, such as tilting or turning the head, squinting, or closing one eye when driving or reading. These compensating postures can cause neck pain and fatigue over time and are worth discussing with your doctor.
How We Evaluate Adult Strabismus
A thorough evaluation guides every treatment decision. Our approach combines careful measurement of the misalignment with a search for any underlying medical cause.
During your visit, we measure the exact degree and direction of your misalignment using a cover test. You focus on a target while the examiner covers and uncovers each eye to observe how your eyes respond. Prism lenses are used to quantify the deviation precisely.
We also assess how each eye moves in all directions to identify which muscles are involved. Restricted movement in a particular direction provides important clues about the cause.
We take a detailed history of when the misalignment began, whether your double vision is constant or comes and goes, and any related symptoms such as headache or a drooping eyelid. Your medical history, including any history of diabetes, thyroid disease, high blood pressure, or prior stroke, helps shape the evaluation.
When a nerve palsy, orbital abnormality, or brain condition is suspected, imaging such as an MRI or CT scan may be ordered. Blood work may be recommended to check thyroid function or blood sugar levels when those conditions are a possibility.
Some causes of sudden double vision require immediate medical care. New double vision accompanied by headache, facial weakness, slurred speech, or loss of balance may signal a stroke and warrants emergency evaluation right away.
A sudden third nerve palsy, which produces double vision along with a drooping eyelid and an enlarged pupil, can indicate a brain aneurysm and also requires urgent imaging. If you develop these symptoms, do not wait for a routine appointment. Go to an emergency room immediately.
Treatment Options for Adult Strabismus
Treatment for adult strabismus is matched to the type, size, and cause of the misalignment. Several effective options are available, and many patients benefit from a combination approach.
Prism lenses are built into eyeglasses and work by bending light before it reaches your eye, shifting the image enough to allow both eyes to work together as a single picture. Prisms are a good option when the deviation is relatively small and stable.
Temporary stick-on prisms, called Fresnel prisms, allow us to test the correct prescription before ordering permanent prisms ground into your lenses. For many adults with mild misalignment, prism glasses alone provide comfortable, functional relief.
Botulinum toxin can be injected into an overactive eye muscle to weaken it temporarily, allowing the eyes to come into better alignment. The effect typically begins within a few days and lasts several months.
This option is sometimes used to test whether a particular alignment is achievable before committing to surgery, or as a primary treatment when surgery is not appropriate. Some patients achieve lasting alignment from injections alone, while others use them as a temporary measure while waiting for their deviation to stabilize.
Strabismus surgery involves adjusting the tension of the eye muscles to bring the eyes into proper alignment. A recession procedure moves a muscle backward to weaken it, while a resection procedure shortens a muscle to strengthen it. Surgery is performed as an outpatient procedure, and most patients go home the same day.
In selected cases, adjustable sutures are used so that alignment can be fine-tuned while you are awake shortly after surgery. This technique is particularly helpful in complex or acquired cases where precision is critical.
Successful strabismus surgery can relieve double vision, restore depth perception, eliminate uncomfortable head tilting, and expand your usable visual field. Many adults also report significant improvements in confidence, social comfort, and quality of life after their eyes are aligned.
A common misconception is that strabismus surgery only works in children. In fact, surgery is safe and effective at any age. Your surgeon will walk you through realistic expectations before your procedure, including the possibility that more than one surgery may be needed to achieve the best result.
Living Well with Adult Strabismus
Strabismus affects more than just your vision. It can touch nearly every part of daily life, from driving and working to how you feel in social situations. The right treatment plan takes all of these factors into account.
Double vision can make driving unsafe. Your doctor will advise you on whether prism glasses, patching, or another approach is appropriate for you to drive legally and comfortably. Many patients find that prism correction restores their ability to drive without difficulty.
Reading, computer use, and activities that require depth perception may also improve with treatment. While you are waiting for definitive treatment, your doctor can suggest practical adjustments to help you stay functional and safe.
Visible eye misalignment can affect how you feel about making eye contact, meeting new people, or performing in professional settings. Research consistently shows that strabismus influences social perceptions and can affect self-confidence and employment opportunities.
Treatment addresses both the functional and emotional sides of the condition. We take the time to understand your personal goals, whether your primary concern is eliminating double vision, improving appearance, or both, and build a plan that works for your life.
Strabismus can change over time, particularly if the underlying condition progresses or if normal aging affects the eye muscles. Regular follow-up exams allow us to catch shifts in alignment early and adjust your treatment plan before symptoms worsen.
If your strabismus began in childhood, periodic reevaluation in adulthood is worthwhile. Alignment often shifts with age, and treatment options that were not available or appropriate earlier in life may now be a good fit.
Frequently Asked Questions
These answers address practical questions that come up often when adults are weighing their options for strabismus care.
There is no upper age limit. What matters is your overall health and the stability of your alignment, not your age. Adults in their seventies, eighties, and older have undergone successful strabismus surgery. Your surgeon reviews your health history to determine whether you are a good surgical candidate.
Strabismus surgery is considered a medical procedure, not a cosmetic one, and most insurance plans provide coverage when double vision, abnormal head posture, or functional limitations are documented in your records. Our team can assist you with the prior authorization process to clarify your coverage before scheduling.
Most patients return to light daily activities within a few days. Your eye will appear red and feel sore or scratchy for several weeks, which is a normal part of healing. Antibiotic and anti-inflammatory eye drops are prescribed during recovery. Full healing typically takes around six to eight weeks, and your doctor will schedule follow-up visits to monitor your alignment during that time.
Some temporary double vision in the first days to weeks after surgery is common. Your brain needs time to adapt to the new eye position, and this adjustment period varies from person to person. If double vision continues beyond the expected window or worsens, contact your surgeon promptly so your sutures or treatment plan can be reassessed.
Vision therapy and orthoptic exercises are helpful for a specific type of misalignment called convergence insufficiency, which affects near focusing. For most types of adult strabismus, exercises alone are not sufficient to correct the deviation. Your doctor will evaluate your specific diagnosis and let you know whether exercises have a meaningful role in your care.
Recurrence is possible, particularly when the underlying cause (such as thyroid disease or diabetes) continues to affect the eye muscles. If your alignment shifts after treatment, additional surgery, adjusted prism glasses, or botulinum toxin injections can address the change. This is one reason why ongoing follow-up care matters even after a successful outcome.
See Our Strabismus Specialist at Rhode Island Eye Institute
If you are experiencing double vision, eye misalignment, or uncomfortable head tilting, we encourage you to schedule an evaluation with Dr. John Donahue, our fellowship-trained Pediatric Ophthalmologist who specializes in strabismus care for adults and children alike. Our team at Rhode Island Eye Institute brings together advanced diagnostic tools and a full range of treatment options to help you achieve comfortable, aligned vision. We welcome patients from across Rhode Island and look forward to supporting you at every step of your care.