What is Rod cell?
'''Rod cells''' are one of two types of [[photoreceptor cell]]s that can be found in the [[retina]] of the [[eye]]s of [[human]]s and other [[mammal]]<nowiki/>s. Rod cells are very sensitive to light. They allow [[night vision]]. They are concentrated at the edge of the retina, where they also allow [[peripheral vision]]. Scientists in 1992 counted an average of 60 million rod cells per human retina.<ref>{{Cite journal|last1=Jonas|first1=J. B.|last2=Schneider|first2=U.|last3=Naumann|first3=G. O.|date=1992|title=Count and density of human retinal photoreceptors|url=https://www.ncbi.nlm.nih.gov/pubmed/1427131|journal=Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht von Graefes Archiv Fur Klinische und Experimentelle Ophthalmologie|volume=230|issue=6|pages=505–510|doi=10.1007/BF00181769|issn=0721-832X|pmid=1427131|s2cid=206771302}}</ref> They counted only 3 million [[cone cell]]<nowiki/>s, the other kind of receptor, which are bigger and perceive color. ==References== {{reflist}} {{sci-stub}} [[Category:Vision]]