Effect Of Using Ophthalmic Viscosurgical Device On Vault Measurements By Intraoperative Oct In Posterior Chamber Phakic Intraocular Lens Implantation

To compare the effects of three implantable collamer lens (ICL) implantation methods on intraoperative vs postoperative vaulting.

Beijing Aier-Intech Eye Hospital, Beijing, China.

A retrospective study was performed on 97 eyes of 67 individuals, of which 32 eyes had anterior chamber full of ophthalmic viscosurgical device (OVD) (group A: full OVD group) before ICL implantation, 29 eyes with a small amount of OVD. (group B: minimum OVD group) before ICL implantation, and 36 eyes with no OVD. (group C: no OVD group) before ICL implantation. Intraoperative vaulting was measured using Zeiss RESCAN 700 technology, and ICL vaulting at 1 day and 1 month postoperatively was measured by frequency-domain optical coherence tomography (FD-OCT).

 In group A, the mean ICL vaulting measured 399.78 ± 24.00 μm intraoperatively, 657.03 ± 31.23 μm at 1 day, and 577.97 ± 33.27 μmat 1 mouth postoperatively (P < 0.001). In group B, the mean ICL vaulting measured 444.24 ± 52.96 μm intraoperatively, 529.14±34.16 μm at 1 day, and 443.00 ± 34.19 μm at 1 mouth postoperatively (P = 0.003). In group C, the mean ICL vaulting measured 620.28 ± 44.92 μm intraoperatively, 717.81 ± 39.87 μm at 1 day, and 634.19 ± 38.52 μm at 1 mouth postoperatively (P < 0.001). Group A showed weak correlation between intraoperative and 1 mouth postoperative vault measurements (R = 0.140, P = 0.445), while Groups B (R = 0.702 P < 0.001) and C (R = 0.649, P < 0.001) demonstrated stronger correlation.

Intraoperative vaulting can be used to predict postoperative vaulting, but it is less predictive when more OVD is injected before the ICL implantation.