목적: 빛의 세기와 순목속도의 상관관계 및 빛의 세기에 따른 시력 회복시간의 차이 여부를 살펴보았다. 방법: 빛의 세기를 5단계로 구분하였으며 각 단계별로 순목속도를 측정하였고 일정한 시간동안 빛에 노출된 피검자들의 시력회복시간을 측정하였다. 결과: 피검사자 39명의 순목속도 평균은 빛의 세기별로 31.97±10.91~33.38±11.20 mm/s였고 빛의 세기와 순목속도는 유의한 상관관계가 없었으며(r=0.006) 소프트콘택트렌즈 착용 전과 착용 후의 순목속도는 유의한 차이가 없었다(p=0.351). 빛의 세기에 따른 시력회복시간을 분산분석한 결과 유의한 차이가 있었고(F=30.67, p

The purpose of this study was to obtain correlation of blinking velocities and RGP contact lens movements, and to understand lens movements related to blinking velocity through the measurement of upper-lid movement. The lens used in this experiment was two types. One was a standard contact lens and another was a fenestrated contact lens that has three holes(diameter of about 200 11m) at optic zone boundary part. But all of parameter were same in two type of contact lens design. With 4 7 subjects(94 eyes), we measured the refractive error, the radius of cornea curvature, the axial length and the thickness of upper-lid. We measured blinking times per second and the contact lens movement after blinking by high speed camera(l frame = 1/60 sec). Blinking average velocity of upper lid and lens movement amount were no significant correlation both two types of contact lenses, but the blinking average velocity and lens reorientation velocity after blinking showed significant correlation (Standard C!L: r = 0.586, Fenestrated C!L: r = 0.504). Mean difference of reorientation velocity between low and high groups in blinking average velocity was significant as well(Standard C/L: p = 0.002, Fenestrated C/L: p = 0.003). There was no statistically different of lens movement amount in standard and fenestrated contact lenses. But reorientation velocity of standard contact lens was faster than fenestrated contact lens(p = 0.002). There was no significant correlation between blinking velocity of upper-lid and lens movement and rotation. While it had strong correlation with blinking velocity and reorientation velocity. lt might be understood through the approach of Bernoulli's equation that is being used commonly in fluid mechanics. As mentioned above, this study is considerably used to evaluate contact lens movements related to blinking and to make some basic information that the upper-lid has an effect on contact lens fitting.