Clinical Trial: Randomized Clinical Trial of Bifocal Lenses Versus Computer-specific Progressive Addition Lenses
Study Status: Terminated
Recruit Status: Terminated
Study Type: Interventional
Official Title: Randomized Clinical Trial of Bifocal Lenses Versus Computer-specific Progressive Addition Lenses on Symptoms and Performance on a Computer
Brief Summary: This is a research study designed to test the utility of D-shaped bifocal lenses and PRIO Computer Lenses for persons using a computer. We hypothesize that lenses specially designed for computer use may allow more comfortable and productive work on a computer.
Detailed Summary:
This is a research study designed to test the utility of D-shaped bifocal lenses and PRIO Computer Lenses for persons using a computer. These are different types of eyeglass lenses and are commonly used when performing computer work. D-shaped bifocal lenses are designed for general purpose use and PRIO Computer Lenses are progressive addition lenses designed for using a computer and are not useful for driving or other tasks requiring clear distance vision. The study will examine how much work a subject completes during a 2-hr visit to the laboratory (productivity) and how a subject feels when working (symptoms). The UAB Department of Optometry sponsors this research study. Interested individuals must be at least 40 years of age and have relatively good vision in each eye when wearing glasses and to do at least 4-hrs of computer work per workday. There are no other restrictions to enter the study.
Participating subjects will be provided one of two different types of lenses and a choice of eyeglass frames. All subjects will be required to use the pair of glasses provided for all computer work for a period of 4 months. During the fourth and eighth weeks of this period, subjects will be required to complete three short surveys over the phone (10 questions) a day for five days (morning, noon and afternoon) on how the glasses affect their work on a computer and how they feel. These surveys should take about 5 minutes or less to complete. During the fifth or sixth week, subjects would be required to visit the laboratory at the School of Optometry to do 2-hours of editing tasks on a computer and complete the same short survey before beginning and after finishing. Participants would be called once a week to confirm that they are wearing the glasses. These calls would last about 2-3 minutes or less.
Upon qualifying for the study, su
Sponsor: University of Alabama at Birmingham
Current Primary Outcome:
- visual comfort index
- productivity (correct words edited per hour)
Original Primary Outcome: Same as current
Current Secondary Outcome:
Original Secondary Outcome:
Information By: University of Alabama at Birmingham
Dates:
Date Received: December 21, 2007
Date Started: October 2006
Date Completion:
Last Updated: June 14, 2011
Last Verified: December 2009
