Vertical Heterophoria and Treatment with Microprism:
The Missing Link
Since first coming across the connection between prism, eyes, and dizziness in 1995, our Detroit-based clinical research team has made significant strides in the understanding and utilization of microprism lenses in the treatment of patients with heterophorias, particularly vertical heterophorias.
Our success in treating these symptomatic patients led us to develop the tools and techniques of NeuroVisual Medicine, and to report them via peer-reviewed research. We are on a mission to share this work and its life-changing effect on patients with our colleagues, both through stories of dramatic patient relief and rigorous clinical research.
Our peer-reviewed and published research demonstrates that by employing NeuroVisual Medicine methods and techniques, patients (including those with concussion/TBI) who are diagnosed with Vertical Heterophoria (VH) and treated with microprism lenses experience an overall reduction of symptoms between 70-80%.
As an outcome of our research, a survey instrument was developed and validated that screens for BVD. The Binocular Vision Dysfunction Questionnaire (BVDQ) is the most powerful tool developed to date that identifies patients who would benefit from a NeuroVisual evaluation.
Conclusions: Results suggest the BVDQ is a valid, reliable screening tool to assist otologists in identifying VH among their dizzy patients. The BVDQ may also be useful for measuring changes with various treatments, and in identifying diverse symptoms associated with BVD/VH.
Conclusions: Screening and treatment for vertical heterophoria using micro-prism lenses provided significant symptom relief for patients with headache, dizziness, and anxiety symptoms that had not responded to traditional treatments.
Outcomes: Results demonstrated marked reduction in all measures of headache, dizziness and anxiety (19.1–60.8%) and an overall subjective improvement of VH symptoms of 80.2%.
Conclusions: Neutralizing prismatic lenses are an effective treatment of headache, dizziness and anxiety in patients with persistent post-concussive symptoms and VH.
Pathophysiology of Binocular Vision Dysfunction
Our understanding of Vertical Heterophoria has been continuously evolving since 1995, and rests upon the following concepts:
✓ There are two forms of VH – misalignment involving only one eye (monocular) and misalignment involving both eyes (binocular)
✓ The monocular form is commonly known as Superior Oblique Palsy, and represents a visual system malfunction
✓ The misalignment associated with the binocular form of VH originates from a faulty signal emanating from the vestibular apparatus
For an in-depth explanation of our current understanding of the pathophysiology of VH, please view this video:
Significant Patient Outcomes in Under 90 minutes
Improve Depth Perception
Randot testing shows an average of +75% increase (3.3 level increase) immediately upon use of the trial frame containing micro prism lenses.*
*Based on unpublished research: N=69 patients
Baseline (Prior to treatment) = 4.3 units
After micro prism lenses = 7.6 units
Reduction in Near Point of Convergence
Patients experience an immediate 50% reduction in Near Point of Convergence testing from 10.1 in to 5.1 with Micro Prism lenses.*
*Based on unpublished research: N=134 patients
Baseline (Prior to treatment) = 10.1 inches
After micro prism lenses = 5.1 inches