Table 2. Preoperative and postoperative mean best-corrected visual acuities at 6 weeks and 6 months after the surgery in the studied groups.
| Variable | ELMc/IS-OSc | ELMc/IS-OSd | ELMd/IS-OSd | P-value |
|---|---|---|---|---|
| Number of eyes (n) | 7 | 29 | 20 | |
| Preoperative BCVA | ||||
| LogMAR (mean±SD) | 0.88±0.56 | 0.89±0.37 | 0.92±0.53 | 0.31 |
| Snellen equivalent (mean) | 20/152 | 20/155 | 20/166 | |
| Postoperative BCVA at 6 weeks | ||||
| Interval between the surgery and postoperative examination, weeks (mean±SD) | 5.8±1.0 | 6.1±0.8 | 6.0±0.8 | 0.23 |
| LogMAR (mean±SD) | 0.49±0.12 | 0.58±0.20 | 0.70±0.26 | 0.08 |
| Snellen equivalent (mean) | 20/62 | 20/76 | 20/100 | |
| Postoperative BCVA at 6 months | ||||
| Interval between the surgery and postoperative examination, months (mean±SD) | 6.3±0.9 | 5.9±0.9 | 6.1±0.9 | 0.82 |
| LogMAR (mean±SD) | 0.27±0.17 | 0.33±0.20 | 0.60±0.25 | 0.03 |
| Snellen equivalent (mean) | 20/37 | 20/43 | 20/80 | |
| Improvement of ≥2 lines, n (%) | 6/7 (85.7) | 25/29 (86.2) | 9/20 (45) | 0.01 |
| Continuous IS-OS at 6 months, n (%) | 7 (100) | 15 (51.7) | 1 (5.0) | 0.001 |
Abbreviations: ELM, external limiting membrane; IS-OS, photoreceptor inner and outer segments junction; BCVA, best-corrected visual acuity; logMAR, logarithm of the minimum angle of resolution; SD, standard deviation.
ELMc/IS-OSc—continuous ELM and continuous IS-OS.
ELMc/IS-OSd—continuous ELM and discontinuous IS-OS.
ELMd/IS-OSd—discontinuous ELM and discontinuous IS-OS.