Effect of incomplete blinking on tear film stability.
Purpose: The purpose of this study is to assess changes in tear film stability caused by incomplete blinking.Methods: Eleven subjects (mean age, 21.3 years) participated in this study. All subjects had a visual acuity of 20/20 or better and normal ocular health. The subjects were asked to play a gam...
| Publicado en: | Optometry & Vision Science Vol. 90; no. 7; pp. 650 - 658 |
|---|---|
| Autores principales: | , , , , |
| Formato: | research Journal Article |
| Publicado: |
Wiley-Blackwell
2013 Jul
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=107906286&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 107906286 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10405488 1X24 jtl: Optometry & Vision Science issn: 10405488 maglogo: N pubinfo: dt: 2013 Jul vid: 90 iid: 7 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 107906286 107906286 NLM23770659 2012166112 10.1097/OPX.0b013e31829962ec NLM23770659 107906286 ppf: 650 ppct: 8 formats: tig: atl: Effect of incomplete blinking on tear film stability. aug: au: Hirota, Masakazu Uozato, Hiroshi Kawamorita, Takushi Shibata, Yuko Yamamoto, Shinya affil: CO, MSc tPhD, DMSc tCO, PhD §MD Department of Visual Science, Kitasato University Graduate School of Medical Sciences (MH, HU, TK, YS, SY), Department of Orthoptics and Visual Science, Kitasato University School of Allied Health Science (HU, TK), and Department of Ophthalmology, Fuchinobe General Hospital, Kanagawa, Japan (SY). sug: subj: Blinking Physiology Computer Terminals Tears Metabolism Adult Dry Eye Syndromes Physiopathology Dry Eye Syndromes Prevention and Control Eye Movements Physiology Female Human Male Visual Acuity Physiology Young Adult Adult: 19-44 years Female Male ab: Purpose: The purpose of this study is to assess changes in tear film stability caused by incomplete blinking.Methods: Eleven subjects (mean age, 21.3 years) participated in this study. All subjects had a visual acuity of 20/20 or better and normal ocular health. The subjects were asked to play a game for 60 min on a personal computer as part of a visual display terminal (VDT) experiment. Each subject's blinking was observed by a Web camera that was attached to the top of the display. Every 15 min, the VDT experiment was interrupted for measurement. An RT-7000 (Tomey Co., Ltd., Nagoya, Japan) was used to measure ring breakup time as a parameter of tear film stability. An OPD-Scan II ARK-10000 (NIDEK Co., Ltd., Aichi, Japan) was used to measure corneal aberrations.Results: Although the total blink rate changed very little, the complete and incomplete blink rates fluctuated during the VDT experiment. Both types were plotted along symmetrical cubic approximation curves. Noninvasive (ring) breakup time at 30 min (4.33 ± 2.57 s) was significantly shorter (p < 0.01) than that at baseline before the VDT experiment (8.62 ± 1.54 s). After 30 min, the incomplete blink rate began decreasing (fewer incomplete blinks), whereas the complete blink rate began increasing. Ring breakup time increased (improved) after 45 min; however, the incomplete blink rate began to increase again after approximately 50 min.Conclusions: Even if the total blink rate decreases, the tear film remains stable so long as almost all blinks are complete. The incomplete blinking contributes to tear film instability and is variable with prolonged VDT exposure. Our study indicated that the tear film stability was determined by blinking quality, and the predominance of blinking type relates to tear film stability. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|