Fig 1.
Image analysis of preoperative and postoperative Optos images of an eye with rhegmatogenous retinal detachment.
(A) In the preoperative ultra-widefield fundus image of an eye with rhegmatogenous retinal detachment, distances from the fovea to the retinal tear (TM), to the center of the vortex vein ampulla (VM) and to the center of the optic disc (DM1) were measured. (B) In the postoperative fundus image of the eye, distances from the fovea to the posterior edge of scleral buckle (BM) and to the center of the optic disc (DM2) were measured.
Table 1.
Preoperative findings.
Fig 2.
Correlation between intraoperative measurement of scleral chord length from limbus to posterior edge of buckle and estimated measurement derived from postoperative Optos imaging.
(A) Correlation between BM/DM2-VM/DM1(B-V) and the scleral chord length (SCL) from the limbus to the posterior buckle edge (r = 0.595; p<0.001, all eyes, n = 29). (B) In the analysis of eyes with axial length (AL) less than 26 mm, SCL = -2.8484 × B-V + 15.893; r = 0.602; p = 0.038, n = 11). (C) In the analysis of eyes with AL of 26 mm or more, SCL = -5.9636 × B-V + 16.822; r = 0.786; p<0.001, n = 18).
Fig 3.
Graph comparing estimated scleral chord lengths based on preoperative Optos imaging with intraoperative measurements of scleral chord length.
Estimated scleral chord length(s) (SCL) from the limbus to retinal breaks (●) was (were) calculated by applying the regression line with the value of (TM-VM)/DM1 in each case. The bars indicate the buckle positions that range between the distances from the limbus to the anterior buckle edge and those from the limbus to the posterior buckle edge.