Representation of retinal-sector thickness in the different retinal layers of C57BL/6J mice at 6, 9, 12, 15, 17, and 20 months of age. For each time studied, n = 6. (RNFL-GCL: retinal nerve fiber layer and ganglion cell layer complex; IPL: inner plexiform layer; INL: inner nuclear layer; OPL: outer plexiform layer; ONL: outer nuclear layer. N1: inner nasal ring; N2: outer nasal ring; S1: inner superior ring; S2: outer superior ring; T1: inner temporal ring; T2: outer temporal ring; I1: inner inferior ring; and I2: outer inferior ring.) Significance values were set to * p < 0.05, ** p < 0.01, and *** p < 0.001.