328 RKFRAOTION AND ACCOMMODATION. jugate focus of an object at a comparatively small distance, is called Short-sig'ht or Myopia (M.), Axial Myopia. In Fig. 105 the inner line at r. is the retina, and f the principal focus of the lens-system, i. e., the position of the retina in the normal eye. Rays… … Myopia. Retina beyond principal focus, hence only near objects (divergent rays) focussed on retina. gate focus r', will form a clear image in the air. Con- versely, an object at r' will form a clear image on the retina (r). The image of every object at a greater dis- tance than r' will be formed…
Eye · Color blindness · Eye Diseases
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