Considering all participants from both refractive error groups together, cAL increased significantly with accommodation (P < 0.001). The mean (± SEM) cAL increase was 11 ± 2 µm at 3 D, 14 ± 2 µm at 6 D, and 26 ± 2 µm at 9 D, with all pairwise comparisons highly significant (all P < 0.001), except the difference between the 3 and 6 D stimuli (P = 0.48). Each anterior eye parameter also changed significantly with accommodation (all P < 0.001), except CCT (P = 0.20). The greatest change occurred for LT, which increased by 128 ± 10, 302 ± 17, and 438 ± 22 µm at the 3, 6, and 9 D accommodation stimuli, respectively (all pairwise comparisons P < 0.001). The posterior surface of the crystalline lens moved posteriorly, indicated by the significant change in ASL, which increased by 32 ± 4 µm at 3 D, 82 ± 8 µm at 6 D and 121 ± 8 µm at 9 D (all pairwise comparisons P < 0.001). ACD decreased significantly with accommodation by −96 ± 8 µm at 3 D, −220 ± 12 µm at 6 D, and −317 ± 16 µm at 9 D (all pairwise comparisons P < 0.001). The cVCD also decreased significantly during accommodation with a reduction of −21 ± 4, −68 ± 7, and −95 ± 8 µm at the 3, 6, and 9 D accommodation stimuli, respectively. All pairwise comparisons were significant (all P ≤ 0.05) except for the difference between cVCD at 0 and 3 D (P = 0.16).