Effects of Gunnar Computer Glasses on Viewing Comfort and Performance
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|ClinicalTrials.gov Identifier: NCT02925884|
Recruitment Status : Terminated (The sponsor failed to provide financial support as promised.)
First Posted : October 6, 2016
Last Update Posted : October 6, 2016
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 visual performance of basic visual function, including visual acuity, contrast sensitivity, color discrimination, etc.
- Any enhancement on 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 strong glare.
- Any benefit in life quality from daily wearing (e.g., better comfort or sleep quality).
|Condition or disease||Intervention/treatment||Phase|
|Dry Eye Eye Strain Visual Acuity Color Perception Reading||Device: Gunnar OTC Glasses Condition||Not Applicable|
Show Detailed Description
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||34 participants|
|Intervention Model:||Crossover Assignment|
|Masking:||None (Open Label)|
|Official Title:||The Effect of Computer Eyewear on Viewing Comfort and Performance in Office Work|
|Study Start Date :||June 2013|
|Actual Primary Completion Date :||September 2013|
|Actual Study Completion Date :||September 2013|
Experimental: Gunnar OTC Glasses Condition
Intervention: Gunnar Over-The-Counter Glasses with lens (subjects will wear the glasses with lens while performing visual tasks on computers.
Device: Gunnar OTC Glasses Condition
Gunnar Over-The-Counter Computer Glasses have optical power of 0.5 diopter for reducing accommodation demands at 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.
No Intervention: Control Condition
Subjects will be wearing an identical frame without any lens while performing visual tasks on computers.
- Subjective rating of Gunnar computer glasses preference [ Time Frame: Measurement was taken at the end of the study for each subject, up to 16 days. Data collection and preliminary analysis has been completed. ]At the end of the study, subjects were asked to rate their satisfaction level of using the Gunnar OTC computer glasses on improving viewing comfort task performance.
- Viewing discomfort [ Time Frame: Subjective ratings of discomfort were assessed after each condition on the second and third visits, up to 16 days. Data collection and preliminary analysis has been completed. ]Subjects subjective rating of viewing comfort with the assigned treatment on the Viewing Symptom Survey. They will rate their discomfort sensation on a 5-point Likert scale for symptoms including: dry or watery eyes, tired eyes, irritated eyes, ache in or behind the eyes, sensation of eye-pulling, sensation of eye-burning, sensitive to lights, blurred vision, double vision, difficulty in adjusting eye focus, difficulty in seeing things with bright light, difficulty in seeing things with normal light, distortion in object shapes, distortion in object colors.
- Visual acuity [ Time Frame: Performance was measured in each condition on the second and third visits, up to 16 days. Data collection and preliminary analysis has been completed. ]subject's ability in identifying high- and low-contrast objects
- Color perception [ Time Frame: Performance was measured in each condition on the second and third visits, up to 16 days. Data collection and preliminary analysis has been completed. ]subject's ability to identify the number of shades of a color
- Reading [ Time Frame: Performance was measured in each condition on the second and third visits, up to 16 days. Data collection and preliminary analysis has been completed. ]subject's reading speed and speed and accuracy in spelling check
- Dry eye measurements [ Time Frame: Measurement was taken at baseline and after each condition on the second and third visits, up to 16 days. Data collection and preliminary analysis has been completed. ]Dry eye condition was measured with one subjective measurement on a standardized survey (Ocular Surface Disease Index , OSDI) and four objective measurements: (1)Tear Break-Up Time (TBUT), (2) tear osmolarity with The TearLab Osmolarity System), (3) corneal integrity with Lissamine green, and (4) real-time blink-contingent visual acuity.
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): NCT02925884
|United States, Oregon|
|Vision Performance Institute, Pacific University|
|Forest Grove, Oregon, United States, 97116|
|Principal Investigator:||Yu-Chi Tai, PhD||Pacific University|