2.1.Photoreceptor structure pigment epithelium 1)an outer segment,filled with stacks of membranes containing the visual long inner pigment molecules like rhodopsins segment (视紫红质)； cell body close 2)an inner segment containing to another mitochondria(线粒体)，ribosomes(核 cone's narrow 糖体)and membranes where opsin(视 waist 蛋白)molecules are assembled and passed to be part of the outer segment discs; 3)a cell body containing the nucleus long axon of the photoreceptor cell; pedicle deeper in 4)a synaptic terminal where OPL and bilobed neurotransmission to second order neurons occurs. rods cones2.1. Photoreceptor structure 1) an outer segment, filled with stacks of membranes containing the visual pigment molecules like rhodopsins (视紫红质); 2) an inner segment containing mitochondria (线粒体), ribosomes (核 糖体) and membranes where opsin (视 蛋白) molecules are assembled and passed to be part of the outer segment discs; 3) a cell body containing the nucleus of the photoreceptor cell; 4) a synaptic terminal where neurotransmission to second order neurons occurs