Strabismus, or eye misalignment, can be corrected through several approaches depending on the type and severity: glasses, vision therapy, Botox injections, or surgery. The right fix depends on what’s causing your eyes to turn, how large the deviation is, and whether you’re a child or adult. Many people need a combination of treatments rather than a single intervention.
How Eye Misalignment Is Measured
Before any treatment begins, your eye doctor will measure how far your eye deviates using a test called a prism cover test. The unit of measurement is the prism diopter. This number matters because it directly shapes what treatment you’ll be offered. A misalignment under 10 prism diopters may be manageable without surgery, while larger deviations often require a procedural approach. Changes in your measurement of less than 10 prism diopters between visits can simply reflect normal test variability, so doctors look for shifts beyond that threshold before changing your treatment plan.
Glasses and Prism Lenses
For some types of strabismus, the fix is as straightforward as wearing the right glasses. Accommodative esotropia, where the eyes cross inward because they’re overworking to focus, often corrects itself once the right prescription reduces that focusing strain. No surgery needed.
When a small misalignment causes double vision but isn’t large enough to warrant surgery, prism lenses can help. These special lenses bend light toward their thicker edge, redirecting images so they land on the correct spot in both eyes simultaneously. The result is that your brain receives aligned images without your eye muscles needing to compensate. Prism lenses work well for deviations up to about 10 prism diopters. Beyond that, the lenses become too thick and heavy to be practical, and a referral to a strabismus surgeon is typically the next step.
Vision Therapy
Vision therapy uses structured exercises to retrain how your eyes work together. It’s most commonly used for intermittent exotropia (eyes that drift outward sometimes but not always) and convergence insufficiency (difficulty pointing both eyes inward for close-up tasks like reading). A typical program runs about three months and progresses through stages: first adapting to complex visual environments in short five-minute sessions, then building up to 20-minute sessions of convergence and divergence exercises that strengthen the coordination between your eyes, and finally working on depth perception tasks for 25 minutes daily.
Research on children with intermittent exotropia shows that combining surgical correction with vision therapy produces better outcomes than surgery alone. In one study, children who did both had significantly lower residual misalignment after six months (about 6 prism diopters) compared to those who had surgery only (about 8.5 prism diopters). The combination group also showed stronger fusion, simultaneous vision, and depth perception. Vision therapy alone won’t fix a large, constant misalignment, but it plays a meaningful role either as a standalone treatment for mild cases or as a complement to surgery.
Botox Injections
Botulinum toxin injections offer a middle ground between glasses and surgery. A small dose, typically around 5 units, is injected directly into the overactive eye muscle. This temporarily weakens that muscle for about two to three months, allowing the eye to shift into better alignment. The injection is guided by a small electrode that confirms the needle is in the right muscle.
Some patients need repeat injections. In protocols studied for children with esotropia (inward-turning eyes), doctors gave up to three injections, adjusting the dose based on how large the remaining misalignment was at follow-up visits. Botox works best for smaller deviations and specific types of strabismus. It’s also useful as a diagnostic tool: if your alignment improves temporarily with Botox, that’s a good signal that surgery on the same muscle would produce a lasting result.
How Strabismus Surgery Works
Surgery is the most direct fix for moderate to large misalignments. It works by physically repositioning the muscles that control eye movement. There are two core techniques. Recession involves detaching a muscle from its current position on the eye and reattaching it further back, loosening its pull. Resection involves cutting out a section of muscle to shorten it, which tightens its pull. Most surgeries use one or both of these techniques on one or two muscles to bring the eyes into alignment.
The procedure is done under general anesthesia for children and often for adults as well. It’s an outpatient surgery, meaning you go home the same day.
Adjustable Sutures
For adults and older teens who can cooperate with a post-operative adjustment, surgeons sometimes use a technique called adjustable sutures. Instead of tying the muscle down permanently during surgery, the surgeon secures it with a temporary knot. After you wake up from anesthesia, usually within one to two hours, the surgeon checks your alignment. If it’s not quite right, they can loosen or tighten the suture right there, fine-tuning the position before locking it in place with a permanent knot.
This approach is especially valuable in complex cases: restrictive strabismus from thyroid eye disease, deviations involving both horizontal and vertical components, eyes that have had previous surgery, or conditions like Duane syndrome where the muscles behave unpredictably. Adjustable sutures give the surgeon a second chance to get alignment right before everything heals.
Surgery Success Rates
Success rates for first-time adult strabismus surgery vary by the type of misalignment. In a study tracking patients for an average of about 15 months, success rates were 80% for esotropia (inward turning), 78% for vertical strabismus (upward or downward turning), 57% for exotropia (outward turning), and 58% for combined types involving more than one direction. These numbers reflect adults with adult-onset strabismus who hadn’t had prior surgery.
The lower success rates for exotropia and combined strabismus don’t mean those surgeries fail outright. Many patients in those groups still see significant improvement, just not full correction to within the target range. Some will benefit from a second procedure.
Double Vision After Surgery
One of the most common concerns about strabismus surgery is whether it will cause double vision. For adults who had childhood-onset strabismus and weren’t experiencing double vision before surgery, the risk is low. Constant double vision in the primary gaze (looking straight ahead) occurred in only about 1% of patients at six weeks and 2% at one year.
That said, some degree of occasional double vision in certain gaze directions is more common: about 19% of patients reported at least rare double vision at six weeks, dropping to 16% at one year. Most of this is intermittent and in peripheral gaze positions rather than straight ahead. For many patients, the brain adapts over time and the double vision resolves.
What Recovery Looks Like
After strabismus surgery, expect redness, soreness, and a gritty feeling in the operated eye. The white of the eye will look noticeably red for the first couple of weeks, sometimes longer. Most people manage discomfort with over-the-counter pain relief and prescribed eye drops to prevent infection and reduce inflammation.
You’ll likely be told to avoid swimming, heavy lifting, and rubbing your eyes for several weeks while the muscles heal. The eye can feel scratchy or irritated during this period because the incision is made through the thin tissue covering the white of the eye. Many adults return to desk work within a few days to a week, though physically demanding jobs require more time off. Final alignment results aren’t apparent immediately, since swelling can temporarily affect eye position. It typically takes six to eight weeks for the eyes to settle into their new alignment, and your doctor will monitor your progress with follow-up visits during that window.