NCT00585026

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.

Trial Health

57
Monitor

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
40

participants targeted

Target at below P25 for phase_3

Timeline
Completed

Started Oct 2006

Shorter than P25 for phase_3

Geographic Reach
1 country

1 active site

Status
terminated

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Start

First participant enrolled

October 1, 2006

Completed
8 months until next milestone

Study Completion

Last participant's last visit for all outcomes

June 1, 2007

Completed
7 months until next milestone

First Submitted

Initial submission to the registry

December 21, 2007

Completed
12 days until next milestone

First Posted

Study publicly available on registry

January 2, 2008

Completed
Last Updated

June 15, 2011

Status Verified

December 1, 2009

First QC Date

December 21, 2007

Last Update Submit

June 14, 2011

Conditions

Refractive ErrorPresbyopiaAsthenopiaEyeglasses

Keywords

Refractive errorAsthenopiaPresbyopiaEyeglassesProductivityVisual comfortErgonomics

Outcome Measures

Primary Outcomes (2)

  • visual comfort index

  • productivity (correct words edited per hour)

Interventions

D-28 bifocal lenses and frameDEVICE
Progressive addition computer lenses and frameDEVICE

Eligibility Criteria

Age40 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • yrs of age or greater
  • /40 or better corrected visual acuity in each eye
  • hrs or more of computer use per workday

You may not qualify if:

  • None

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

School of Optometry

Birmingham, Alabama, 35294-0010, United States

Location

MeSH Terms

Conditions

Refractive ErrorsPresbyopiaAsthenopia

Condition Hierarchy (Ancestors)

Eye Diseases

Study Officials

  • Kent M. Daum, O.D., Ph.D.

    School of Optometry, University of Alabama at Birmingham

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
SINGLE
Purpose
TREATMENT
Intervention Model
PARALLEL
Sponsor Type
OTHER

Study Record Dates

First Submitted

December 21, 2007

First Posted

January 2, 2008

Study Start

October 1, 2006

Study Completion

June 1, 2007

Last Updated

June 15, 2011

Record last verified: 2009-12

Locations

US(1)