ClinicalTrials.gov
ClinicalTrials.gov Menu

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

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00317525
Recruitment Status : Completed
First Posted : April 25, 2006
Last Update Posted : September 11, 2006
Sponsor:
Information provided by:
American Optometric Association

Study Description
Go to 
Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information
Brief Summary:
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 or disease Intervention/treatment Phase
Refractive Errors Asthenopia Device: Spectacle Lenses Phase 3

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.

Study Design
Go to 
Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Study Type : Interventional  (Clinical Trial)
Enrollment : 36 participants
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: Effects of Different Add Powers on the Comfort and Productivity of Computer Users With Fixed or Free Head Movement
Study Start Date : May 2005
Study Completion Date : June 2006

Resource links provided by the National Library of Medicine

U.S. FDA Resources

Arms and Interventions
Go to 
Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information


Outcome Measures
Go to 
Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Primary Outcome Measures :
  1. Visual comfort
  2. Productivity (correct words per hour)

Eligibility Criteria
Go to 
Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   40 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
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
Go to 
Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): 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
Go to 
Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

ClinicalTrials.gov Identifier: NCT00317525     History of Changes
Other Study ID Numbers: X050314015
First Posted: April 25, 2006    Key Record Dates
Last Update Posted: September 11, 2006
Last Verified: May 2005

Keywords provided by American Optometric Association:
Refractive error
Asthenopia

Additional relevant MeSH terms:
Refractive Errors
Asthenopia
Eye Diseases