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Table 1 Clinical characteristics of the affected eyes

From: Changes of macular vessel density and thickness in gas and silicone oil tamponades after vitrectomy for macula-on rhegmatogenous retinal detachment

  Eyes with gas tamponade Eyes with silicone oil tamponade P value (Mann-Whitney/Fisher-Chi Square test)
Age, years 55.5 ± 9.68 51.5 ± 10.1 0.159
Sex 4 M/12F 7 M/10F 0.465
Laterally 12R/4 L 9R/8 L 0.282
Duration between symptoms and surgery, days 18.2 ± 15.9 25.8 ± 19.0 0.168
Proliferative vitreoretinopathy grades, eyes PVR A&B:8
PVR C:8
PVR A&B:8
PVR C:9
1.000
Extension of RRD (number of clock-hours involved) 3.7 ± 0.9 3.7 ± 0.7 0.908
Number of retinal tears/breaks 1.1 ± 0.3 1.2 ± 0.4 0.685
Frequency of retinal breaks involving the inferior 4 clock-hours’ area 1/17 4/16 0.335
Axial length, mm 23.9 ± 0.8 24.1 ± 1.1 0.792
Follow-up duration, months 36.3 ± 3.7 35.8 ± 3.7 0.698
LogMAR BCVA at presentation,
Snellen equivalent
0.25 ± 0.18
20/36
0.30 ± 0.22
20/40
0.509
IOP at presentation, mmHg 12.5 ± 2.6 13.6 ± 2.5 0.171
LogMAR BCVA at the follow-up,
Snellen equivalent
0.17 ± 0.23
20/30
0.49 ± 0.28
20/62
< 0.001
IOP at the follow-up 16.5 ± 3.2 18.6 ± 4.7 0.191
  1. PVR Proliferative vitreoretinopathy, RRD Rhegmatogenous retinal detachment, logMAR Logarithm of the minimum angle of resolution, BCVA Best corrected visual acuity, IOP Intraocular pressure