J Korean Ophthalmol Soc.  2017 Jun;58(6):706-711. 10.3341/jkos.2017.58.6.706.

Comparison of Blinking Patterns When Watching Ultra-high Definition Television: Normal versus Dry Eyes

• Kang BS
• Seo MW
• Yang HK
• Seo JM
• Lee S
• Hwang JM

• KMID: 2382680
• DOI: http://doi.org/10.3341/jkos.2017.58.6.706

Abstract

PURPOSE
To analyze blinking patterns when watching an ultra-high definition (UHD) television and to compare the results between normal eyes and dry eyes.
METHODS
A total of 59 participants aged from 13 to 69 years were instructed to watch a colorful and dynamic video on a UHD television for 10 minutes. Before and after watching the UHD television, we measured the best corrected visual acuities, autorefraction, tear-break-up-time, degree of corneal erosion and conjunctival hyperemia via slit lamp biomicroscopy. In addition, questionnaires for the evaluation of eye fatigue and symptoms of a dry eye were completed. The definition of dry eye syndrome was that the tear-break-up-time of one of the eyes was less than 5 seconds, conjunctival injection, or marked corneal erosion. The number of blinks and the duration of blinking were both measured and analyzed at the early and late phases of video-watching.
RESULTS
After watching the UHD television in the normal eye group, the tear-break-up-time was significantly decreased (p < 0.001) and the degree of corneal erosion was significantly increased (p = 0.023). However, the subjective symptoms of participants were not aggravated (p = 0.080). There were no significant differences in blinking patterns in the dry eye group. On the other hand, in the normal eye group, the mean blinking time was significantly increased (p = 0.030).
CONCLUSIONS
Watching an UHD television changes the tear-break-up-time, degree of corneal erosion, and blinking pattern in normal eyes, which may increase the risk of dry eye syndrome.

Keyword

Blinking; Dry eye; Ultra-high definition television

MeSH Terms

Asthenopia
Blinking*
Dry Eye Syndromes
Hand
Hyperemia
Slit Lamp
Television*
Visual Acuity

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