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

Tracking Information

First Received Date ^ICMJE

April 21, 2006

Last Updated Date

September 7, 2006

Start Date ^ICMJE

May 2005

Primary Completion Date

Current Primary Outcome Measures ^ICMJE

Visual comfort
Productivity (correct words per hour)

Original Primary Outcome Measures ^ICMJE

Same as current

Change History

Complete list of historical versions of study NCT00317525 on ClinicalTrials.gov Archive Site

Current Secondary Outcome Measures ^ICMJE

Original Secondary Outcome Measures ^ICMJE

Descriptive Information

Brief Title ^ICMJE

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

Official Title ^ICMJE

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

Brief Summary

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 Phase

Phase III

Study Type ^ICMJE

Interventional

Study Design ^ICMJE

Treatment, Randomized, Double-Blind, Placebo Control, Factorial Assignment, Efficacy Study

Condition ^ICMJE

Refractive Errors
Asthenopia

Intervention ^ICMJE

Device: Spectacle Lenses

Study Arms / Comparison Groups

Publications *

* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.

Recruitment Information

Recruitment Status ^ICMJE

Completed

Enrollment ^ICMJE

Completion Date

June 2006

Primary Completion Date

Eligibility Criteria ^ICMJE

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

Gender

Both

Ages

40 Years and older

Accepts Healthy Volunteers

Yes

Contacts ^ICMJE

Contact information is only displayed when the study is recruiting subjects

Location Countries ^ICMJE

United States

Administrative Information

NCT ID ^ICMJE

NCT00317525

Responsible Party

Study ID Numbers ^ICMJE

X050314015

Study Sponsor ^ICMJE

American Optometric Association

Collaborators ^ICMJE

Investigators ^ICMJE

Principal Investigator:

Kent M Daum, O.D., Ph.D.

School of Optometry, University of Alabama at Birmingham

Information Provided By

American Optometric Association

Verification Date

May 2005

^ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP