Photoreceptor topography of the retina in the New World monkey Cebus apella.
The number and topographical distribution of photoreceptors was studied in whole-mounted retinas of Cebus apella. It was estimated a total of 48 million rods and 3.8 million cones. The average peak foveal cone density and the Nyquist Limit at the foveola were estimated as 169, 127 cells/mm(2) and 46.77+/-7.98 cyc/deg, respectively. A cone-enriched rim was found near the ora serrata, more noticeable in the nasal retina. Rod distribution was asymmetrical along horizontal and vertical meridians with a higher density in the dorsal retina. The rod/cone ratio was variable and asymmetrical along both meridians.
Departamento de Fisiologia e Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Pernambuco, Brazil.
B L
BL
Andrade da Costa
J N
JN
Hokoç
D000818:Animals; D002428:Cebus; D002452:Cell Count; D005260:Female; D005584:Fovea Centralis / Q000033:anatomy & histology; D008297:Male; D020419:Photoreceptor Cells, Vertebrate / Q000166:cytology*; D012160:Retina / Q000033:anatomy & histology*