Table 1 Patient characteristics at baseline
Total N = 127 | New-generation lens first N = 63 | Older-generation lens first N = 64 | |
|---|---|---|---|
Patient characteristics | |||
-Sex (male/female) [n (%)] | 49/78 (38.6/61.4) | 21/42 (33.3/66.7) | 28/36 (43.7/56.3) |
-Age (years) [mean (SD)] | 53.0 (5.1) | 52.1 (4.9) | 53.9 (5.1) |
-Time since the first prescription for progressive lens for presbyopia (years) [mean (SD)] | 5.7 (4.5) | 5.5 (4.8) | 6.0 (4.1) |
-Time since patients wore their equipment before having a new prescription for progressive lens for presbyopia (years) [mean (SD)] | 2.3 (2.0) | 2.1 (1.9) | 2.5 (2.0) |
Reason for prescription | |||
-Correction modification [n (%)] | 90 (70.9) | 39 (61.9) | 51 (79.7) |
-Lack of comfort [n (%)] | 22 (17.3) | 12 (19.0) | 10 (15.6) |
-Aesthetics [n (%)] | 16 (12.6) | 9 (14.3) | 7 (10.9) |
Visual defect | |||
-Myopia [n (%)] | 51 (40.5) | 27 (43.5) | 24 (37.5) |
-Hyperopia [n (%)] | 75 (59.5) | 35 (56.4) | 40 (62.5) |
-Astigmatism [n (%)] | 89 (70.1) | 46 (73.0) | 43 (67.2) |
Previous correction | |||
-Anti-reflection coated (yes) [n (%)] | 94 (74.6) | 51 (82.3) | 43 (67.2) |
-Sphere sign RE (+/-) [n (%)] | 67/48 (58.3/41.7) | 31/24 (56.4/43.6) | 36/24 (60.0/40.0) |
-Sphere sign LE (+/-) [n (%)] | 71/47 (60.2/39.8) | 33/25 (56.9/43.1) | 38/22 (63.3/36.7) |
-Sphere RE [mean (SD)] | 1.0 (0.7) | 0.9 (0.8) | 1.0 (0.7) |
-Sphere LE [mean (SD)] | 1.0 (0.7) | 1.0 (0.8) | 0.9 (0.6) |
-Cylinder RE [mean (SD)] | 0.6 (0.3) | 0.6 (0.3) | 0.5 (0.3) |
-Cylinder LE [mean (SD)] | 0.6 (0.3) | 0.6 (0.3) | 0.6 (0.3) |
-Axis RE [mean (SD)] | 95.7 (59.0) | 83.4 (57.5) | 108.7 (58.5) |
-Axis LE [mean (SD)] | 92.3 (58.7) | 99.1 (52.5) | 85.3 (64.6) |
-Addition RE [mean (SD)] | 1.9 (0.6) | 1.9 (0.7) | 1.9 (0.5) |
-Addition LE [mean (SD)] | 1.9 (0.6) | 1.9 (0.7) | 1.9 (0.5) |
New correction | |||
-Sphere sign RE (+/-) [n (%)] | 70/50 (58.3/41.7) | 30/26 (53.6/46.4) | 40/24 (62.5/37.5) |
-Sphere sign LE (+/-) [n (%)] | 73/50 (59.3/40.7) | 35/26 (57.4/42.6) | 38/24 (61.3/38.7) |
-Sphere RE [mean (SD)] | 1.0 (0.7) | 1.0 (0.8) | 1.1 (0.7) |
-Sphere LE [mean (SD)] | 1.0 (0.8) | 1.1 (0.8) | 1.0 (0.7) |
-Cylinder RE [mean (SD)] | 0.6 (0.4) | 0.6 (0.4) | 0.6 (0.5) |
-Cylinder LE [mean (SD)] | 0.7 (0.4) | 0.7 (0.4) | 0.6 (0.5) |
-Axis RE [mean (SD)] | 101.2 (58.4) | 91.7 (57.5) | 112.6 (58.2) |
-Axis LE [mean (SD)] | 95.6 (58.6) | 97.6 (53.5) | 93.7 (63.7) |
-Addition RE [mean (SD)] | 2.1 (0.5) | 2.1 (0.5) | 2.2 (0.5) |
-Addition LE [mean (SD)] | 2.1 (0.5) | 2.1 (0.5) | 2.2 (0.5) |