pu'pil

[L. pupilla, dim. of pupa, a girl or doll.] The circular orifice, in the center of the iris through which the light rays enter the eye. Ar'gyllRob'ertson p., one in which the accommodation reflex persists while the light reflex is lost. artifi'cial p., an opening made by excision of a portion of the iris in order to improve the vision in cases of central opacity of the cornea or lens, etc. bound'iag p., an i so coria in which there is a rapid dilatation of the pupil alternating with contraction, cat's-eye p., a distorted pupil elongated in the vertical axis, ezclu's ion of the p., the condition resulting from posterior annular synechia, in which the iris is bound down throughout the entire pupillary margin, but the pupil is not occluded, key'hole p., a p. with an artificial coloboma on one side of the pupillary margin. occlu's ion of the p., the presence of an opaque membrane closing the pupillary area, pinhole p., an extremely contracted pupil, seclu's ion of •the p., exclusion of the p. stiff p., Argyll Robertson p. absence, acorea, atretopsia. contraction, miosis, myosis core phthisis, coreclisis, steno cor i as is, stnocoria dilatation, core diastasis, cor ectasis, mydriasis, platy coria. double^ diplocoria. equality in size of the two, isocoria. examination, pupil los copy coroscopy. imperforation, atretopsia. inequality in size of the two, an i so coria. instrument for measuring, coreometer, pupillometer. irregularity in shape, dyscoria, core metamorphosis. making an artificial, see under iris, malposition, cor ectopia. measurement of, coreometry, pupil lome try. multiple, poly coria. obliteration, coreclisis, synizesis pupillse.