The influence of eye solutions on blinking and ocular comfort at rest and during work at video display terminals
The influence of eye solutions on blinking and ocular comfort at rest and during work at video display terminals
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DOI：
10.1006/exer.1998.0656
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发表时间：
1999-06-01
影响因子：
3.4
通讯作者：
Belmonte, C
中科院分区：
文献类型：
--
作者：
Acosta, MC;Gallar, J;Belmonte, C
本研究的目的是研究在视频显示终端工作时眨眼频率的变化和眼部不适的程度，以及增加或减少眼表湿化对这些参数的影响。眨眼频率是通过记录眼轮匝肌收缩引起的电信号来测量的。在休息和在稳定的环境条件下用电脑执行任务（玩纸牌游戏）10或30分钟时，以及在连续的空气流应用于面部时，分析眨眼率和眨眼间隔。在两个单独的疗程中，研究了不同弹性粘度的湿润眼液（平衡盐溶液或弹性粘性0.1%海兰A溶液）预处理的效果。在每个实验期结束时，受试者在0-10厘米视觉模拟量表上标记眼部不适程度。使用有空气和无空气的弹性黏性滴眼液对面部进行预处理后，静止时的眨眼频率（12.4 +/- 1.2次/ min(-1)）显著降低（至10.3 +/- 1.1次/ min(-1)）。在执行10或30分钟的视觉任务期间，基础眨眼率显著下降，约为控制值的40%。无论是在脸上喷喷空气，还是使用不同粘度的眼部溶液，都不能改变这种降低的眨眼率。低程度的眼部不适发展后的视觉任务的表现，是由空气应用于面部增强。这种不适感可以通过眼液预处理来减轻，弹性粘性眼液比平衡盐溶液更有效。弹粘溶液处理后，眨眼间隔时间也更有规律。这些数据表明，静止时的眨眼频率在一定程度上是由角膜和结膜感觉受体的激活维持的，这些受体是由眼表干燥刺激的。用计算机执行视觉任务所引起的眨眼频率的减少似乎依赖于完全独立于外围感觉输入的中枢神经机制。连续使用电脑的眨眼频率减少与不适感有关，弹性粘性眼药水比常规平衡盐溶液更有效地减轻了不适感。(C) 1999学术出版社。
The aim of this work was to study blink frequency changes and levels of ocular discomfort during work at a video display terminal, and the effects on these parameters of augmented or reduced humidification of the ocular surface.Blink rate was measured from recordings of the electrical signal evoked by the contraction of the orbicularis oculi muscle. Blink rate and interblink intervals were analyzed at rest and during performance of a task with a computer (playing a card game) for 10 or 30 min in steady environmental conditions and during application of a continuous stream of air to the face. In two separate sessions, the effect of pretreatment with humidifying ocular solutions of different elastoviscosity (balanced salt solution or elastoviscous 0.1% Hylan A solution) was assayed. At the end of each experimental period, the subjects marked the level of ocular discomfort experienced on a 0-10 cm visual analogue scale.The blink frequency at rest (12.4 +/- 1.2 blinks min(-1)) was reduced significantly (to 10.3 +/- 1.1 blinks min(-1)) by pretreatment with elastoviscous eyedrops both with and without air applied to the face. This effect was not obtained with balanced salt solution, During performance of the visual task for 10 or 30 min, basal blink rate decreased significantly, to about 40% of the control value. Neither application of an air jet on the face nor application of eye solutions of different viscosity modified this reduced blink rate.A low degree of ocular discomfort developed after performance of the visual task that was enhanced by air application to the face. This discomfort was reduced by pretreatment with ocular solutions, the elastoviscous eye solution being more efficient than the balanced salt solution. Interblink interval duration was also more regular after treatment with the elastoviscous solution.These data suggest that blink rate at rest is maintained in part by activation of sensory receptors of the cornea and conjunctiva, which are stimulated by desiccation of the ocular surface. Reduction of eye blink frequency elicited by the performance of a visual task with a computer appears to depend on central neural mechanisms that are quite independent of peripheral sensory inputs. The reduction of blink frequency consecutive to computer use was associated with a sensation of discomfort that was attenuated more effectively by elastoviscous eyedrops than by regular balanced salt solution. (C) 1999 Academic Press.