CAJ | 학술논문

人眼对空间图形的感知取决于视觉系统对相关基本物理属性变量(包括亮度、空间频率、对比度及方向等)的信息处理.因而,对视觉行为(或视觉质量)的准确评估需要完整地测量视觉系统对这些基本变量的反应能力.由于视力测量仅反应高亮度、高对比度下视觉分辩能力,更为全面地测量视觉质量的技术,包括对比敏感度测量和对比度视力测量,已被成功地开发并广泛地应用于视觉研究与眼科临床之中.大量研究表明,不同对比度下视觉行为的测量能有效地应用于:①大部分眼科疾病的早期诊断,以及视觉干预或眼科手术效果的跟踪;②对部分眼病的特殊诊断;③视觉异常导致日常生活行为障碍的评估.另外,计算机化的视功能检测因具有可规范程度高、稳定性好、可靠性强以及测量精度高等特点,将成为应用于人眼视觉测量的必然趋势.
인안대공간도형적감지취결우시각계통대상관기본물리속성변량(포괄량도、공간빈솔、대비도급방향등)적신식처리.인이,대시각행위(혹시각질량)적준학평고수요완정지측량시각계통대저사기본변량적반응능력.유우시력측량부반응고량도、고대비도하시각분변능력,경위전면지측량시각질량적기술,포괄대비민감도측량화대비도시력측량,이피성공지개발병엄범지응용우시각연구여안과림상지중.대량연구표명,불동대비도하시각행위적측량능유효지응용우:①대부분안과질병적조기진단,이급시각간예혹안과수술효과적근종;②대부분안병적특수진단;③시각이상도치일상생활행위장애적평고.령외,계산궤화적시공능검측인구유가규범정도고、은정성호、가고성강이급측량정도고등특점,장성위응용우인안시각측량적필연추세.
Human vision for spatial pattern depends on information processes in the visual system for several basic physical variables, such as luminance, spatial frequency (or size), contrast and orientation, which determine characteristics of the pattern. Therefore, assessment of visual performance or visual quality needs to systematically measure the ability of the visual system in response to these variables. Because visual acuity only tests the resolution power under high luminance and high contrast, techniques capable of comprehensively assessing visual ability, such as the contrast sensitivity and contrast visual acuity tests, have been developed and widely applied in both eye research and clinical practice. Studies have shown that visual test under varied contrasts could be effectively used to ①diagnose many common eye diseases in the early stage and monitor effects of ophthalmic intervention and treatment; ②diagnose some specific visual disorders; and ③assess problems in daily performances which are associated with visual defects. Due to its highly standardization, and superior reliability, repeatability and accuracy in visual measurement,computerized technique will be the method for assessing visual performance in the future.