视敏度(visual acuity):视杆细胞vs.视锥细胞 视杆细胞 视锥细胞 1)peripheral rods foveal cones large spacing high density (lower density) 2)large small convergence convergence Ganglion cells “一对三十” “一对三” integrate information integrate information from a large area ofretina(3 deg) from a small area of retina(.03 deg) large spacing and large convergence small spacing and low convergence result in low acuity result in high acuity. 视杆细胞 视锥细胞 “一对三十” “一对三” 视敏度（visual acuity）：视杆细胞 vs. 视锥细胞 南医大王优爱课资料