RETINAL SENSITIVITY AND VESSEL DENSITY AFTER MACULAR HOLE SURGERY WITH THE SUPERIOR INVERTED INTERNAL LIMITING MEMBRANE FLAP TECHNIQUE.

To evaluate retinal vessel density and retinal sensitivity (RS) after macular hole surgery with the superior inverted internal limiting membrane flap technique. Retrospective, observational case series. Twenty-one patients with idiopathic macular hole underwent 27-gauge vitrectomy with the superior inverted internal limiting membrane flap technique and triamcinolone acetonide. Measurements included RS, which was measured with microperimetry, as well as retinal vessel density in the superficial capillary plexus (SCP) and deep capillary plexus (DCP), which was measured with optical coherence tomography angiography. All parameters were evaluated in the superior and inferior sectors of the macula preoperatively and 1, 3, and 6 months postoperatively. Six months postoperatively, retinal thickness in the inferior sector was unchanged, but retinal thickness in the superior sector decreased significantly (P < 0.01). SCP vessel density in both sectors was unchanged at all postoperative time points. DCP vessel density in both sectors increased very significantly at 3 months (P < 0.01) and returned to baseline at 6 months. RS in the inferior sector increased by 47% 3 months postoperatively and by 61% 6 months postoperatively (P < 0.05 and P < 0.001, respectively), but RS in the superior sector increased only at 6 months postoperatively and only by 22% (P < 0.05). Lower recovery of RS in the superior sector suggests that internal limiting membrane peeling might affect the postoperative visual function.