(A) The number of terminal dendrites (ends) in the P33 mice was significantly less than that in the P12 and the dark-reared P33 mice (P < 0.001; P < 0.05 and P > 0.05, for comparison between P12 and P33, comparison between P33 and P33D and comparison between P12 and P33D, respectively, Student t-test), despite the numbers of primary dendrites of A type RGCs were similar in retinas of P12, P33 and P33D mice. (B) Comparison of numbers of branches at different orders of A type RGCs in P12, P33 and P33D mice. (C) Average segment lengths of dendritic arbors at different orders of A type RGCs in the P12, P33 and P33D mice. Average segment tortuosity (D) and dendritic planar angles (E) of A type RGCs at different branch orders in the P12, P33 and P33D mice. *, ** and ***, P < 0.05, P < 0.01, P < 0.001, respectively, for comparison between P12 and P33; #, ## and ###, P < 0.05, P < 0.01, P < 0.001, respectively, for comparison between P33 and P33D.