Analyses of variance (ANOVAs) were performed to compare group mean values for the different study parameters. An initial two (glaucoma versus normal) by two (phakic versus pseudophakic) by four (age category) ANOVA was performed. The age range and descriptive statistics of the main groups (glaucoma versus normal and phakic versus pseudophakic) are given in the subject section. The four age categories used for the ANOVAs were (1) 49 to 59, (2) 60 to 69, (3) 70 to 79, and (4) 80+ years and the breakdown for the four age categories for the normal observers was phakic normal: (1) range, 49 to 59 years; n = 6; mean age, 55.2 ± 3.9; (2) range, 61 to 69 years; n = 10; mean age, 64.3 ± 3.9; (3) range, 70 to 78 years; n = 8; mean age, 73.6 ± 2.9; and (4) range, 80 to 88 years; n = 8; mean age, 83.6 ± 3.0; and pseudophakic normal: (1) range, 49 to 58 years; n = 5; mean age, 54.2 ± 4.0; (2) range, 60 to 68 years; n = 10; mean age, 64.2 ± 4.1; (3) range, 71 to 77 years; n = 10; mean age, 75.2 ± 2.0, and (4) range, 80 to 88 years; n = 10; mean age, 83.4 ± 3.3.
For the glaucomatous observers the breakdown was phakic glaucomatous: (1) range, 49 to 59 years; n = 11; mean age, 54.4 ± 3.4; (2) range, 60 to 69 years; n = 16; mean age, 65.1 ± 3.0; (3) range, 70 to 79 years; n = 27; mean age, 73.9 ± 2.7; (4) range, 80 to 84; n = 6; mean age, 81.7 ± 1.4; and pseudophakic glaucomatous: (1) range, 50 to 58 years; n = 3; mean age, 54.3 ± 4.0; (2) range, 63 to 68 years; n = 8; mean age, 65.1 ± 1.7; (3) range, 70 to 79 years; n = 17; mean age, 75.6 ± 3.3; and (4) range, 80 to 93 years; n = 10; mean age, 84.4 ± 4.1.