As eyecare professionals, you will encounter patients daily that have been struggling with visual symptoms for years, often believing their issues are simply part of their normal experience. Recently, I evaluated a 32-year-old woman whose case perfectly illustrates why some patients need more than a standard primary care exam; they need the comprehensive approach that behavioral optometry provides.

The Patient Who Lived with "Normal"

This patient came to our office having never received satisfactory glasses. Her chief complaint was simple, she has difficulty focusing and wants some new glasses. To many practitioners, this might seem like a straightforward refractive error case. Run through the standard examination protocol, prescribe glasses, and move on. The "7, 4, out the door" approach that keeps the schedule moving.

On diving more into her story I learned that her complaints were extensive: difficulty focusing her eyes, closing one eye while driving to see clearly, severe light sensitivity, and a history labeled as "dyslexia" though formal diagnosis and intervention were uncertain. She also reported multiple concussions and whiplash injuries over the years.

Digging Deeper: The Power of a Comprehensive History

The key to unlocking this patient's visual struggles wasn't found in her refraction, which was just a simple +1.00 OU, it was instead embedded in her history. By spending time exploring the nuances of her visual experience, patterns emerged that pointed beyond simple refractive error.

Her need to close one eye while driving wasn't just light sensitivity or poor acuity, it was a compensation strategy. When your visual system struggles to coordinate both eyes effectively, the brain sometimes suppresses input from one eye to eliminate confusing double images or visual strain. This wasn't something she did consciously; it was her nervous system's adaptive response to binocular vision dysfunction.

The history of concussions and whiplash was equally revealing. Traumatic brain injuries, even seemingly minor ones, can disrupt the delicate neurological pathways that coordinate eye movements and alignment, and that permit seamless integration of the information seen by the two eyes. What might have been dismissed as coincidental medical history was actually central to understanding her current visual dysfunction.

Her reported "dyslexia" also took on new meaning. While dyslexia is a language-based learning disability, visual inefficiencies, particularly problems with convergence and eye teaming, can create reading difficulties that mimic or exacerbate dyslexic symptoms. Without proper evaluation and treatment of the visual component, her reading struggles may have been incompletely addressed.

The Diagnosis

Specialized binocular vision testing revealed the underlying problem: convergence excess esophoria, or, basic esophoria greater at near than distance; I did not discover an outright strabismus even though some of the comments that she said made me certainly think I would find one. In simpler terms, her eyes have a generalized tendency to turn inward and this gets worse when focusing on near objects. This creates strain, discomfort, and visual confusion. This explained why reading was difficult, why screens were exhausting, and why she instinctively closed one eye to simplify her visual input.

This diagnosis did not emerge from a standard refraction or a quick glance at her eye alignment. It requires detailed testing of how the eyes work together at various distances, under different lighting conditions, and with sustained visual demands. It requires understanding the relationship between accommodation (focusing) and convergence (eye alignment), and recognizing when that relationship has become dysfunctional.

A Behavioral Optometric Solution

The treatment plan I recommended reflects the behavioral optometric approach: addressing not just what the patient sees, but how the visual system functions as an integrated whole.

First, I prescribed glasses with 2pd base-out prism, placed over only her right eye. This intervention helps reduce the excessive outward pull of her eyes, making it easier for her to maintain comfortable alignment without constant muscular effort. The prism shifts the visual demand, allowing her visual system to not have to constantly work to diverge her eyes. I placed it over her right eye and wrote for the optician to not split the prism between the two eyes because she recounted to me how her right eye is always the one that feels more uncomfortable and how that is the eye that she squints closed the most. Monocular prism can be an incredibly useful tool even if you do not discover any diplopia during your testing.

Second, and perhaps more importantly, I recommended for her to enroll in vision therapy. This neuromuscular rehabilitation program trains the visual system to coordinate the eyes more effectively, re-synchronizes the relationship between accommodation and vergence, and helps integrate visual function with other sensory and motor systems affected by her history of head trauma.

Vision therapy isn't just eye exercises; it's a structured program designed to improve visual processing, eye teaming, focusing flexibility, and visual-motor integration. For someone with her history and symptom profile, it offers the possibility of fundamental improvement in visual function rather than just optical compensation.

Why This Matters for Our Profession

This case illustrates a critical distinction in eyecare: the difference between checking the eyes and evaluating visual function. A standard primary care exam might have given this patient a prescription for glasses that compensated for her refractive status but it wouldn't have addressed why she has struggled for many years or why glasses never seemed to help.

Behavioral optometry recognizes that vision is more than 20/20 acuity. Vision is composed of the complex integration of sensory input, motor output, and cognitive processing. Some patients need this deeper level of care, especially those with:

As professionals, our responsibility is recognizing when a patient's needs exceed routine care and ensuring they receive appropriate referral or treatment. Not every patient needs behavioral optometric intervention, but some, like this 32-year-old woman, desperately do.

For patients who have been told "your eyes are fine" while continuing to struggle, behavioral optometric services may finally provide the answers and relief they've been seeking.