Effects of Gunnar Computer Glasses on Viewing Comfort and Performance

NCT02925884 | Terminated Results

• 2 other identifiers: PUIRB075-13Gunnar2013
• Study Type: interventional
• Target: 35
• Locations: 1 country
• Sites: 1

Brief Summary

The proposed study aims to test if Gunnar computer glasses provide any advantages, in comparison to no glasses, on the following aspects in computer-related office work:

• Any enhancement on the visual performance of the basic visual function, including visual acuity, contrast sensitivity, color discrimination, etc.
• Any enhancement on the visual performance of typical office work, including reading, word-spelling check, number searching, or target identification.
• Any benefit in objective viewing comfort measured with viewing distance, blink frequency, post-viewing pupil size.
• Any benefit in subjective viewing comfort reflected on the questionnaire of viewing symptom survey.
• Any benefit in viewing comfort and visual performance with increased environmental ventilation or under the strong glare.
• Any benefit in life quality from daily wearing (e.g., better comfort or sleep quality).

Conditions

Dry Eye; Eye Strain; Visual Acuity; Color Perception

Keywords

Computer Glasses; Dry eye; Eye strain; Gunnar Glasses

Outcome Measures

Primary Outcomes (1)

• Subjective Rating of Gunnar Computer Glasses Preference

  At the end of the study in Visit 3, subjects were asked to respond if they felt the Gunnar TC Glasses improved their computer viewing comfort and visual performance (choose between "Yes" and "No").

  at the end of the study in Visit 3, up to day 16

Secondary Outcomes (10)

• Subjective Viewing Discomfort Rating

  Data were collected at the end of Visit 2 (at least 3 days after Visit 1, between Day 4 and Day 8) and Visit 3 (at least 3 days after Visit 2, up to Day 16).

• Visual Acuity

  during Visit 2 (at least 3 days after Visit 1, between Day 4 and Day 8) and Visit 3 (at least 3 days after Visit 2, up to Day 16)

• Color Perception

  during Visit 2 (at leadays after Visit 1, between Day 4 and Day 8) and Visit 3 (at least 3 days after Visit 2, up to Day 16)

• Spelling Check Accuracy

  Performance was measured during visit 2 (at least 3 days after Visit 1, between Day 4 and Day 8) and visit 3 (at least 3 days after Visit 2, up to Day 16).

• Dry Eye Measurements (1): Tear Film Break-up Time (Seconds)

  during Visit 2 (at least 3 days after Visit 1, between Day 4 and Day 8) and Visit 3 (at least 3 days after Visit 2, upto Day 16)

Study Arms (2)

Experimenter: Gunnar OTC Glasses, Then Control

EXPERIMENTAL

On Visit 1, after the screening and baseline measurements, participants were given a pair of Gunnar OTC glasses (Intervention 1) and asked to work on the computer with the glasses for at least 4 hours for 5+/-2 days of adaptation (Habituation 1). On Visit 2, they performed the designated computer tasks with the glasses to complete the Gunnar condition. Then they were asked to work on the computers for at least 4 hours without any glasses (Intervention 2) for another 5+/-2 days (Habituation 2). On Visit 3, they performed the same tasks without any glasses to complete the Control condition. Then Participants responded if they prefer wearing the Gunnar OTC Glasses when working on a computer.

Device: Gunnar OTC Glasses

Experimenter: Control, Then Gunnar OTC Glasses

EXPERIMENTAL

On Visit 1, after the screening and baseline measurements, participants were told to work on the computer for at least 4 hours without glasses (Intervention 1) for 5+/-2 days of adaptation (Habituation 1). On Visit 2, they performed the designated computer tasks without glasses to complete the Control condition. Then they were given a pair of Gunnar OTC Glasses to wear (Intervention 2) while working on the computers for 4+ hours daily for another 5+/-2 days (Habituation 2). On Visit 3, they performed the same tasks with the Gunnar glasses to complete the Gunnar condition. Then Participants responded if they prefer wearing the Gunnar OTC Glasses when working on a computer.

Device: Gunnar OTC Glasses

Interventions

Gunnar OTC Glasses DEVICE

Gunnar Over-the-Counter Computer Glasses have optical power of 0.5 diopters for reducing accommodation demands at a typical computer-viewing distance. The lens also have a partially transmissive yellow tinting and anti-reflective coating for filtering part of the spectral peaks in typical fluorescent or incandescent light. The frame has a wrape-around design meant to reduce air flow in the vicinity of the eyes.

Experimenter: Control, Then Gunnar OTC Glasses; Experimenter: Gunnar OTC Glasses, Then Control

Eligibility Criteria

• Age: 18 Years - 42 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Subjects must be between 18 to 42 years old.
• Subjects must have a normal color vision (be able to identify the numbers in the color blind test.
• Subjects' near and far visual acuity with the better eye needs to be 20/25 or better (measured with a vision chart). Subjects can wear contact lenses (but not glasses) if usually wear them while working on computers.
• Subjects must routinely work on a computer or digital display for an average of 4 hours or more each day.
• Subjects can communicate in English fluently and are used to read English documents on a computer.
• Subjects must have a valid tax number or social security number to receive monetary compensation.

You may not qualify if:

• The difference in the prescription for both eyes is equal to or larger than 2 Diopters.
• Subjects have a cataract or have had cataract surgery.
• Subjects are sensitive to lights (photosensitivity).
• Subjects have prior incidents or are known to have claustrophobia.
• Subjects have been diagnosed with oculomotor diseases or central nervous system diseases, or with developmental, neurological, or psychiatric disorders (e.g., attention deficit hyperactivity disorder, autism, mental retardation).

Sponsors & Collaborators

• Pacific University: lead
• Gunnar Optiks: collaborator

Study Sites (1)

Vision Performance Institute, 129 Scott Hall, Pacific University

Forest Grove, Oregon, 97116, United States

Location

Related Links

• Summary of the current findings

MeSH Terms

Conditions

Dry Eye Syndromes; Asthenopia

Condition Hierarchy (Ancestors)

Lacrimal Apparatus Diseases; Eye Diseases

Results Point of Contact

• Title: Yu-Chi Tai
• Organization: Pacific University

ytai@pacificu.edu

503-352-2289

Study Officials

• Yu-Chi Tai, PhD

  Pacific University

  PRINCIPAL INVESTIGATOR

Publication Agreements

• PI is Sponsor Employee: No
• Restrictive Agreement: No

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: OTHER
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Research Scientist

Study Record Dates

• First Submitted: June 17, 2013
• First Posted: October 6, 2016
• Study Start: June 1, 2013
• Primary Completion: September 1, 2013
• Study Completion: September 1, 2013
• Last Updated: July 16, 2025
• Results First Posted: July 16, 2025

Record last verified: 2025-06

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)