Examination of the Eye & Ear. Professor Janet M. Galiczewski RN,CCRN,MSN,ANP. A & P Outer Eye. External Eye. Eyelid : Distributes tears, limits light entering eye, protects eye. Upper lid covers 2-3 mm of iris but NOT pupil. The lower lid sits directly on the lower ring of the iris
Professor Janet M. Galiczewski
30=distance at which normal eye can read that line of letters.