Subthreshold Micropulse Photocoagulation for Persistent Macular Edema Secondary to Branch Retinal Vein Occlusion including Best-Corrected Visual Acuity Greater Than 20/40
Table 4
Changes in BCVA after subthreshold micropulse diode laser photocoagulation ( = 32).
Change in BCVAa
ā
1 month
3 months
6 months
12 months
Improved (, %)
Total ( = 32)
3/32 (9.4%)
4/32 (12.5%)
3/32 (9.4%)
5/32 (15.6%)
Group I ( = 15)
3/15 (20.0%)
4/15 (26.7%)
3/15 (20.0%)
5/15 (33.3%)
Group II ( = 17)
0/17 (0%)
0/17 (0%)
0/17 (0%)
0/17 (0%)
Unchanged (, %)
Total ( = 32)
29/32 (90.6%)
26/32 (81.3%)
26/32 (81.3%)
25/32 (78.1%)
Group I ( = 15)
12/15 (80.0%)
11/15 (73.3%)
10/15 (66.7%)
9/15 (60.0%)
Group II ( = 17)
17/17 (100.0%)
15/17 (88.2%)
16/17 (94.1%)
16/17 (94.1%)
Worsened (, %)
Total ( = 32)
0/32 (0%)
2/32 (6.3%)
3/32 (9.4%)
2/32 (6.3%)
Group I ( = 15)
0/15 (0%)
0/15 (0%)
2/15 (13.3%)
1/15 (6.7%)
Group II ( = 17)
0/17 (0%)
2/17 (11.8%)
1/17 (5.9%)
1/17 (5.9%)
BCVA: best-corrected visual acuity; Group I: eyes with BCVA 20/40; Group II: eyes with BCVA 20/40.
aChange in BCVA is defined as 0.2 or more log MAR (logarithm of the minimal angle of resolution) value. Improved: 0.2 or more log MAR gain; Unchanged: within 0.2 log MAR change; Worsened: 0.2 or more log MAR loss.