Effects of Different Add Powers on the Comfort and Productivity of Computer Users With Fixed or Free Head Movement

This study has been completed.
Sponsor:
Information provided by:
American Optometric Association
ClinicalTrials.gov Identifier:
NCT00317525
First received: April 21, 2006
Last updated: September 7, 2006
Last verified: May 2005
  Purpose

The aim of this study is to examine the relationship between optical blur from poor refractive corrections (glasses) of older workers using computers and their productivity and comfort in the workplace. The investigators believe that improving the visual status of subjects who use computers will have a beneficial effect on productivity and visual comfort.


Condition Intervention Phase
Refractive Errors
Asthenopia
Device: Spectacle Lenses
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Factorial Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: Effects of Different Add Powers on the Comfort and Productivity of Computer Users With Fixed or Free Head Movement

Resource links provided by NLM:


Further study details as provided by American Optometric Association:

Primary Outcome Measures:
  • Visual comfort
  • Productivity (correct words per hour)

Estimated Enrollment: 36
Study Start Date: May 2005
Estimated Study Completion Date: June 2006
Detailed Description:

The aim of this study is to examine the relationship between optical blur from poor refractive corrections (glasses) of older workers using computers and their productivity and comfort in the workplace. We believe that improving the visual status of subjects who use computers will have a beneficial effect on productivity and visual comfort. All subjects will be required to complete a vision screening at no charge to decide if they qualify for the study. This is a double-blind study, which means that neither the subject nor the doctors will know which pair of lenses you will be wearing during the parts of the study. Subjects will complete a total of 4 hours of testing. The total amount of testing will be divided into ten 15-minute periods. During each period, the investigator will place different lenses in a trial frame. The trial frame that the subject will wear during the experiment will have their prescription for near plus an unknown pair of lenses. During the testing, the subject will complete a task involving finding and deleting apostrophes from a manuscript on a standard computer. Either the investigator or co-investigator will explain how to do this simple task. Subjects will answer a short survey before and after these tasks to check on symptoms resulting from using the computer. The following periodic measurements will be made during the study: productivity and accuracy to search for apostrophes (‘) in a document on one of the states of the U.S. These tasks will require a total of 4 hours testing with a total of ten pairs of trial lenses during a single visit.

  Eligibility

Ages Eligible for Study:   40 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • 40 years of age or greater
  • 20/40 visual acuity or better in each eye
  • Use a computer at least 1 hour per work day
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00317525

Locations
United States, Alabama
School of Optometry
Birmingham, Alabama, United States, 35294-0010
Sponsors and Collaborators
American Optometric Association
Investigators
Principal Investigator: Kent M Daum, O.D., Ph.D. School of Optometry, University of Alabama at Birmingham
  More Information

No publications provided

ClinicalTrials.gov Identifier: NCT00317525     History of Changes
Other Study ID Numbers: X050314015
Study First Received: April 21, 2006
Last Updated: September 7, 2006
Health Authority: United States: Institutional Review Board

Keywords provided by American Optometric Association:
Refractive error
Asthenopia

Additional relevant MeSH terms:
Asthenopia
Refractive Errors
Eye Diseases

ClinicalTrials.gov processed this record on April 16, 2014