Clinical Trial: Effects of Prismatic Spectacle Lenses on Symptoms of Dizziness, Headache and Anxiety as Caused by Vertical Heterophoria

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional

Official 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

Brief Summary:

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.

Detailed Summary:
Sponsor: Vision Specialists of Birmingham

Current Primary Outcome: Evidence of change / improvement of symptoms of headache, dizziness and anxiety as demonstrated by validated, self-administered survey tools for these symptoms [ Time Frame: Survey tools administered at baseline, 5-7 days after wearing the first pair of glasses, 5-7 days after wearing the second pair of glasses, and when treatment is completed ]

Original Primary Outcome: Same as current

Current Secondary Outcome: Evidence that a new survey tool developed by the authors to assess changes / improvement in dizziness, headache and anxiety associated with Vertical Heterophoria correlates to validated, self-administered survey tools for these same symptoms [ Time Frame: New survey tool to be administered at baseline, 5-7 days after wearing the first pair of glasses, 5-7 days after wearing the second pair of glasses, and when treatment is completed ]

Original Secondary Outcome: Same as current

Information By: Vision Specialists of Birmingham

Dates:
Date Received: November 3, 2008
Date Started: November 2008
Date Completion:
Last Updated: December 8, 2015
Last Verified: December 2015