Research Study Summary
Patients are needed to participate in a clinical research study of Lenses containing prismatic correction and Lenses not containing prismatic correction to evaluate Binocular Dysfunction, Vertical Heterophoria, Vision, Binocular or Vision Disparity
Research Study Title
Effects of Vertical Prism on the Symptoms of Dizziness, Headache and Anxiety as Caused by Vertical Heterophoria: A Randomized, Double-blinded, Placebo-controlled, Cross-over Study
The purpose of this study is to demonstrate whether, in patients diagnosed with Vertical
Heterophoria, the symptoms of dizziness, headache and / or anxiety are reduced or
eliminated when a kind of correction called vertical prism is added to the patient's normal
eye glass prescription.
The experiment will involve giving the patient two pairs of glasses (one pair containing the
baseline prescription with vertical prism (Standard Treatment Glasses) and the other pair
containing the baseline prescription but without vertical prism (Placebo Glasses)) to
demonstrate which pair of glasses is most effective in reducing the symptoms of dizziness,
headache and / or anxiety in these patients.
To Learn more