Influence of endotamponade on visual outcome after vitrectomy due to rhegmatogenous retinal detachment

Abstract

Purpose. To compare the morphological and functional outcome after vitrectomy with gas and silicone oil tamponade due to rhegmatogenous retinal detachment. Material and methods. The study included 59 eyes after vitrectomy with silicone oil and gas tamponade. The 1st group (31 eyes) consisted of cases with silicone oil 1300 cSt tamponade, the 2nd group (28 eyes) – cases with C2F6 gas tamponade. Results. According to OCT data, in patients of the 1st group an epiretinal membrane occurs 4.1 times more often than in patients of the 2nd group (χ²= 4.391, df= 1,p= 0.036), cystic edema of the outer nuclear layer and the layer of Henle fibers was detected only in the 1st group in 16 % of cases (χ²= 4.766, df= 1, p = 0.029), pseudocysts and cysts of INL predominated in the 1st group (χ²= 4.325, df= 1, p=0.029). Fundus microperimetry revealed a lower value of retinal sensitivity in the group with silicone oil tamponade. In zone I it was 20 [13.0; 22.0] and 21 [20; 23] for the 1st and 2nd groups respectively (U = 183.500, p = 0.025). In zone II, a decrease was found in the upper temporal 21 [15.2; 24.5] and 23.5 [21.5; 24] (U = 176.000, p = 0.018), upper nasal 20 [16; 22.5] and 23.5 [ 20.5; 24.5] (U = 138.000, p = 0.002) and lower nasal sector 22.0 [19.0; 23.0] and 23.0 [20.5; 24] (U = 189.000, p = 0.034) for the 1st and 2nd groups respectively. In zone III, the decrease is demonstrated in the upper temporal and upper nasal quadrants, amounting to 23 [20.5; 24] and 24 [23; 25.5] (U =184.5, p =0.027); 22 [16.75; 23] and 23.5 [22.5; 25] (U =184.5, p =0.004) for the 1st and 2nd groups respectively. In zone IV, changes were detected in the nasal sectors, amounting to 21.5 [17.5; 23] and 23.5 [22; 25] (U =137.500, p = 0.002) in the upper nasal sector, 21.5 [19; 23,0] and 23 [21.5; 24.0] (U = 183.000, p = 0.025) in the lower nasal sector for the 1st and 2nd groups, respectively. Conclusion. The use of silicone oil tamponade is associated with lower retinal sensitivity compared to gas tamponade. Keywords: rhegmatogenous retinal detachment, microperimetry, silicone oil endotamponade.