If you grew up hearing the words crossed eyes, lazy eye, or wandering eye at a pediatric eye appointment, you’re not alone. These are the everyday terms families use for a condition doctors call strabismus – an eye misalignment where one eye doesn’t point in the same direction as the other. Many adults who were diagnosed as kids carry a vague memory of an eye patch, some exercises, maybe a surgery, and a reassurance from someone in a white coat that they’d simply “grow out of it.”
And yet, decades later, they find themselves squinting through headaches at the end of a workday. They lose their place while reading. They feel vaguely off-balance in grocery stores or on stairs. They can’t quite pin down why busy environments feel so draining. When they mention it to a doctor, the symptoms get chalked up to stress, screen time, or aging, and almost never connected back to that childhood diagnosis.
In our Boynton Beach practice, we see this story all the time. And most of the time, there’s a simple reason those symptoms never went away: strabismus is a form of Binocular Vision Dysfunction (BVD), and the eye misalignment that was visible in childhood often leaves behind a subtler, less obvious version in adulthood. Let’s walk through what that connection actually looks like.
What Is Strabismus, in Plain Language?
Strabismus is the medical term for eyes that don’t line up together. One eye may turn inward (toward the nose), outward (toward the ear), upward, or downward while the other eye looks straight ahead. Depending on the direction of the turn, you may have heard it called esotropia (eye turns in), exotropia (eye turns out), hypertropia (eye turns up), or hypotropia (eye turns down) – but to most families, it’s just “crossed eyes” or a “wandering eye.”
According to the American Academy of Ophthalmology, adult strabismus occurs when the eyes are not properly aligned and one eye turns in a different direction than the other (inward, outward, upward, or downward) while the other eye looks straight ahead. It’s a definition that applies whether the misalignment is obvious enough for a stranger to notice or so small that no one has ever seen it but you.
And here’s something many people don’t realize: strabismus isn’t only a childhood condition. Although more typically associated with the pediatric population, strabismus affects an estimated 4% of adults in the United States as well. That number includes adults who developed new misalignment later in life and adults who were diagnosed as kids and still carry residual alignment issues today.
“Lazy Eye” vs. Strabismus: They’re Not the Same Thing
One quick clarification, because the terminology gets jumbled constantly. “Lazy eye” is a layperson’s phrase that’s used for two different conditions that often show up together:
- Strabismus – the physical misalignment of the eyes
- Amblyopia – reduced vision in one eye because the brain has learned to favor the other
These can coexist. When a child’s brain sees two mismatched images from misaligned eyes, it sometimes suppresses the input from one eye to avoid confusion – and that suppression, over time, leads to amblyopia. When people say “lazy eye,” they might mean either condition. We’ll address amblyopia more fully in a future post, but for now, keep in mind that the turn you can see is strabismus; the reduced vision behind it may be amblyopia.
How Strabismus Fits Into Binocular Vision Dysfunction
Here’s where things click into place. Binocular Vision Dysfunction is the umbrella term for any condition where your two eyes aren’t working together as a coordinated team. Your brain expects both eyes to send back perfectly aligned images that it can fuse into a single, stable, three-dimensional picture of the world. When those images don’t line up, even by a tiny amount, the brain has to work overtime to force them together, and that effort has a cost.
Strabismus is one of the more visible forms of BVD. Conditions like vertical heterophoria, where one eye sits just slightly higher than the other, are on the same spectrum – just often far less obvious to the naked eye. What they all share is a breakdown in the teamwork between the eyes, which is why we treat them as related members of the binocular vision dysfunction family.
The symptoms can be strikingly similar, too, because the underlying strain is the same. Whether the eye turn is large and obvious or vanishingly small, the brain is still straining to fuse two images, and the strain tends to show up in the same ways: headaches, dizziness, reading fatigue, neck and shoulder tension, sensitivity to busy visual environments, and poor depth perception.
“But I Already Had Surgery” – Why Symptoms Can Linger
This is the conversation we have most often with adult patients who were treated for strabismus as children. They had the eye patch. They did the vision therapy. Maybe they had one surgery, maybe two. The eye turn is gone, at least cosmetically. So why do they still feel awful at the end of a reading session? Why do escalators still make them queasy? Why does driving at night feel harder than it should?
The answer is that strabismus surgery realigns the muscles, but it doesn’t always restore the brain–eye teamwork that binocular vision depends on. The eyes may now look straight, but the neurological pattern the brain developed to cope with the misalignment (the suppression, the compensatory head tilt, the tendency of one eye to drift under fatigue) can persist. And because most pediatric care doesn’t screen for the subtle residual misalignment that remains, patients are often told everything looks fine when, functionally, it isn’t.
That residual misalignment is, in essence, a form of BVD. It’s why an adult whose childhood strabismus was “corrected” decades ago can still benefit from a neurovisual evaluation today.
The Symptoms We Look For in Adults With a Strabismus History
When someone walks into our office and mentions a childhood strabismus diagnosis, we’re not just looking for a visible eye turn. We’re listening for the pattern of symptoms that point to lingering binocular vision strain. These commonly include:
- Headaches or migraines, especially after reading or screen work
- Dizziness, vertigo, or feeling off-balance without a clear vestibular cause
- Difficulty reading – losing your place, skipping lines, or re-reading paragraphs
- Poor depth perception (missing a step, misjudging distances while parking)
- Anxiety in visually complex environments like stores, stadiums, or highways
- Neck and shoulder tension, or a persistent head tilt you didn’t know you had
- Double vision – sometimes constant, sometimes only when tired
If several of these sound familiar, the connection to your childhood diagnosis may be more than coincidence.
How Neurovisual Care Approaches a History of Strabismus
Our approach centers on measuring alignment with far more precision than a standard eye exam typically offers. Dr. Erin Sonneberg, Florida’s first certified NeuroVisual Optometrist, who trained directly under Dr. Debby Feinberg of Vision Specialists of Michigan, the pioneer of this field, uses a specialized measurement protocol designed to detect the small misalignments that general exams miss entirely.
When a misalignment is identified, the treatment is often a pair of microprism lenses. Prism glasses work by bending incoming light just enough to bring the two images your eyes send to your brain back into agreement, which means your brain no longer has to force the fusion itself. For many patients, the relief is surprisingly fast. Headaches ease. Reading gets easier. The world feels steadier.
Prism isn’t a replacement for surgery, and it isn’t right for every patient. But for adults whose childhood strabismus was treated cosmetically without fully restoring binocular function, it’s often the missing piece no one ever offered them.
If Your Childhood Diagnosis Is Still Affecting You, We’d Like to Help
If you were diagnosed with strabismus, lazy eye, or a wandering eye as a child, and you’re still dealing with headaches, dizziness, reading difficulties, or depth-perception problems that no one has been able to explain, we’d love to take a closer look. These symptoms aren’t something you have to keep living with, and they aren’t in your head. As South Florida’s pioneering neurovisual practice, our Boynton Beach team specializes in the kind of precision measurement that brings the root cause into focus. The best next step is our brief BVD questionnaire. It takes a few minutes and helps us understand whether a neurovisual evaluation is likely to help you.
