| 释义 |
parafovea Anat.|pærəˈfəʊvɪə|
Also with hyphen.
[f. para-1 + fovea, or as back-formation from next.]
An annular area of the retina immediately surrounding the fovea centralis. Cf. perifovea.
1941S. L. Polyak Retina xvi. 211 The parafoveal region or parafovea is the intermediate belt of the central area [of the retina]. 1944Jrnl. Optical Soc. Amer. XXXIV. 713/1 Rods, though absent from the fovea, appear in the parafovea and increase to a maximum density within the area of the retina to which the bright field image is projected. 1960R. A. Weale Eye & its Function v. 65 The corneo-lenticular system cannot form a sharp and undistorted image outside an area called the para-fovea. This surrounds the macula and would be covered by the image of a circular disc subtending at the eye an angular diameter of some 20°. 1970J. A. Howard Aerial Photo-Ecol. xiii. 141 The fovea is most sensitive to green light at 0·555µ whilst in subdued light the para-fovea responds most to light at 0·515µ. |