Table 2.
Comparison of clinical characteristics according to the visibility of posterior scleral border.
| Parameters | Visibility of posterior scleral border | P-value | |
|---|---|---|---|
| Visible at all points | Invisible at any points | ||
| Number of eyes (%) | 164 (69.2%) | 73 (30.8%) | – |
| Mean age, years (range) | 62.4 ± 11.0 (24–84) | 63.0 ± 12.9 (27–89) | 0.739 |
| Mean axial length, mm (range) | 31.1 ± 2.1 (25.8–37.1) | 28.8 ± 2.0 (25.1–33.8) | < 0.001 |
| Mean baseline BCVA, logMAR (range, Snellen equivalent) | 0.62 ± 0.58 (− 0.08 to 2.50, 20/83) | 0.38 ± 0.44 (− 0.18 to 2.50, 20/48) | 0.003 |
| Category of myopic maculopathy | |||
| Category 1 (fundus tessellation) | 22 (13.4%) | 41 (56.2%) | < 0.001 |
| Category 2 (diffuse atrophy) | 71 (43.3%) | 24 (32.9%) | |
| Category 3 (patchy atrophy) | 55 (33.5%) | 6 (8.2%) | |
| Category 4 (macular atrophy) | 16 (9.8%) | 2 (2.7%) | |
| Choroidal thickness, μm (range) | |||
| Subfoveal | 25.0 ± 16.2 (0–95) | 55.1 ± 39.0 (0–187) | < 0.001 |
| Superior | 47.1 ± 32.1 (0–178) | 90.9 ± 52.7 (0–245) | < 0.001 |
| Inferior | 37.8 ± 28.2 (0–153) | 71.3 ± 39.2 (0–190) | 0.008 |
| Temporal | 41.9 ± 34.3 (0–165) | 82.5 ± 52.0 (0–257) | < 0.001 |
| Nasal | 23.9 ± 19.1 (0–137) | 40.3 ± 24.5 (0–149) | 0.083 |
| Scleral thickness, μm (range)a | |||
| Subfovealb | 261.2 ± 86.9 (103–501) | 336.8 ± 87.1 (125–570) | < 0.001 |
| Superior | 237.6 ± 73.5 (90–517) | 361.1 ± 76.8 (210–522) | < 0.001 |
| Inferior | 227.0 ± 61.5 (93–447) | 290.9 ± 77.1 (118–469) | < 0.001 |
| Temporal | 229.4 ± 71.8 (70–448) | 297.1 ± 89.1 (153–469) | < 0.001 |
| Nasal | 257.2 ± 78.2 (69–488) | 291.8 ± 64.8 (120–492) | 0.003 |
| Presence of posterior staphyloma | 124 (75.6%) | 45 (61.6%) | 0.028 |
| Curvature index (range)b | 1.049 ± 0.032 (1.011–1.241) | 1.035 ± 0.027 (1.007–1.181) | 0.003 |
BCVA best-corrected visual acuity, logMAR logarithm of minimal angle of resolution.
aIncluded only points where scleral thickness was measurable.
bExcluded eyes with dome-shaped macula.