>Aims: To determine the repeatability of ocular surface sensitivity to mechanical stimulation using air stimuli and the effect of contact lens (CL) wear on sensitivity.>Methods: Repeatability: 14 subjects (24–39 years) participated. Mechanical sensitivity to warmed (34°C) and ambient (20°C) air was measured for the central cornea (CC), inferior cornea (IC), and inferior conjunctiva (ICON). Measurements were taken on 12 days; six morning and six afternoon measurements. Differences between sites, time of day, and stimulus temperature were evaluated. CL wear: 10 subjects (22–30 years) participated. Measurements were taken at the same time of day, either following no wear, wear of a CL of oxygen permeability [Dk] of 28×10−9 [cm/s][ml O2/ml mm Hg] or wear of a CL of Dk 140×10−9 [cm/s][ml O2/ml mm Hg]. Differences between sites and wear conditions were evaluated.>Results: Repeatability: Sensitivity varied between sites (p<0.01), time of day (p<0.05), and stimulus temperatures (p<0.01). There were no significant differences between days. Mean thresholds for eye temperature stimuli were; CC 64.4 (SD 28.6) ml/min; IC 84.6 (40.0) ml/min; ICON 120.6 (40.4) ml/min and for ambient temperature stimuli were CC 53.9 (16.0) ml/min, IC 59.0 (20.0) ml/min; ICON 72.6 (43.7) ml/min. CL wear: Sensitivity varied between sites and wear conditions (p<0.05). Conjunctival sensitivity was increased after wear of highly oxygen permeable CLs but unaffected by wear of low oxygen permeable CLs.>Conclusions: The prototype gas aesthesiometer is able to repeatably measure ocular surface sensitivity and measurements are consistent with previously reported techniques.
展开▼
机译:>目的: strong>:确定使用空气刺激对机械刺激进行眼表敏感性的可重复性以及隐形眼镜(CL)佩戴对敏感性的影响。>方法: strong>可重复性:14名受试者( 24-39岁)参加了。对中央角膜(CC),下角膜(IC)和下结膜(ICON)测量了对热(34°C)和环境(20°C)空气的机械敏感性。在12天进行测量;六个上午和六个下午的测量。评估了部位,一天中的时间和刺激温度之间的差异。 CL穿着:10名受试者(22–30岁)参加了比赛。在一天中的同一时间进行测量,要么不磨损,要么穿氧渗透率CL(Dk)为28×10 -9 sup> [cm / s] [ml O2 / ml mm Hg ]或CL的磨损为Dk 140×10 −9 sup> [cm / s] [ml O2 / ml mm Hg]。评估部位和磨损条件之间的差异。>结果: strong>可重复性:部位(p <0.01),一天中的时间(p <0.05)和刺激温度(p <0.01)之间的灵敏度各不相同。几天之间没有显着差异。眼睛温度刺激的平均阈值为: CC 64.4(SD 28.6)毫升/分钟; IC 84.6(40.0)毫升/分钟; ICON 120.6(40.4)ml / min,环境温度刺激为CC 53.9(16.0)ml / min,IC 59.0(20.0)ml / min; ICON 72.6(43.7)毫升/分钟CL磨损:敏感度在位置和磨损条件之间变化(p <0.05)。佩戴高透氧量的CL后结膜敏感性增加,但不受戴低透氧量的CL的影响。>结论: strong>原型气体麻醉仪能够重复测量眼表敏感性,并且测量结果与以前报道的技术一致。
展开▼