眼科系统检查英文1.pptVIP

What’s visual function light perception color vision visual acuity contrast sensitivity stereoscopic vision Examination of visual function The Affiliated Hospital of Medical College, Qingdao University Examination of the eye History-taking Examination of visual function Examination of the globe and its accessory organs ? simultaneous perception fusion stereoscopic vision triple visual function Examination of visual function Visual acuity —— visual acuity chart Dark adaptation Color vision —— pseudoisochromatic plates Visual field —— perimeter Stereoscopic vision —— synoptophore Contrast sensitivity Visual electro-physiology Visual acuity (far vision) Visual acuity test chart Abundant light or artificial illumination A distance of 5m The line 1.0 be at the same height of examined eye The right eye is at first, then the left, from top to bottom v OD 0.8 OS 0.6 International standard visual acuity chart logarithmic visual acuity chart Visual acuity (far vision) Unable to read 0.1, moved closer to the chart utill the letter can be read V=d/D × 0.1 (the actual distance/the standard distance ×0.1) V=visual acuity D=the distance in which normal eye can see the line clearly (5m) d=the distance in which the examined sees clearly (3m) V=3/5 × 0.1=0.06 Visual acuity (far vision) Finger count Can’t see 0.1 clearly even at the distance of 1m from the chart The examined stands in the back of the light V=FC/50cm Hand moving Counting fingers is not possibe even at 5cm V=HM/20cm Visual acuity (far vision) Light perception The next lower level of vision In dark room Use a candle or a torch Cover one eye with the palm LP NLP Color vision Pseudoisochromatic plates (color blindness book) Nature light A distance of 0.5m Within 5 seconds achromatopsia color?weakness Visual field Definition When the eye is fixed and staring at straight ahead, the visible range of space is called visual field. Clarification Central visual field (within 3