Centre for Ocular Research and Education (C.B.H., W.N.), University of Waterloo School of Optometry and Vision Science, Waterloo, ON, Canada ; and Centre for Eye and Vision Research (CEVR) (W.N.), Hong Kong.
Eye Contact Lens. 2021 Jun 1;47(6):347-351. doi: 10.1097/ICL.0000000000000783.
To quantify the effect of spectacle frame dimensions on wind-induced ocular plane evaporation.
A drop of 0.5 μL water was pipetted onto an eye of a mannequin head. The face was fitted with a spectacle frame. A fan positioned 10 cm away directed air (185 CFM) toward the face and the time required for the drop to evaporate was recorded. This procedure was repeated with 31 different frames to obtain evaporation times for various eye sizes, vertical heights, vertex distances, temperature, and humidity. This was also repeated 30 times without spectacle wear to obtain evaporation times for various temperature and humidity conditions.
Spectacle wear increased evaporation times compared with nonspectacle wear, in both high (>35%) and low humidity (<30%) conditions (both P<0.01). Humidity was correlated with evaporation time, regardless of spectacle and nonspectacle wear (both P<0.01). Evaporation time did not correlate with spectacle eye size, vertical height, or vertex distance (all P≥0.21).
This study showed that spectacle wear guarded against wind-induced evaporation at the ocular plane compared with nonspectacle wear. However, once spectacles were worn, eye size, vertical height, and vertex distance were not correlated with evaporation times. Humidity drove evaporation independent of spectacle wear.
定量研究镜架尺寸对风致眼平面蒸发的影响。
将 0.5 μL 的水滴在人头模型的一只眼睛上。人脸佩戴眼镜架。一个距离 10 厘米的风扇将空气（185 CFM）吹向人脸，记录水滴蒸发所需的时间。对 31 个不同的镜架重复该过程，以获得不同眼睛尺寸、垂直高度、顶点距离、温度和湿度下的蒸发时间。不戴眼镜重复该过程 30 次，以获得不同温度和湿度条件下的蒸发时间。
与不戴眼镜相比，戴眼镜在高湿度（>35%）和低湿度（<30%）条件下均增加了蒸发时间（均 P<0.01）。无论是否戴眼镜，湿度均与蒸发时间相关（均 P<0.01）。蒸发时间与眼镜的眼睛尺寸、垂直高度或顶点距离均不相关（均 P≥0.21）。
本研究表明，与不戴眼镜相比，眼镜佩戴可防止风致眼平面蒸发。然而，一旦戴上眼镜，眼睛尺寸、垂直高度和顶点距离与蒸发时间无关。湿度独立于眼镜佩戴驱动蒸发。
