Comparison of Intraocular Lens Stability and Reversibility in Phacovitrectomy With Air or Gas Tamponade Using One-
Yuji Yoshikawa1, Jun Makita1, Kei Shinoda1
1Ophthalmology, Saitama Medical University Hospital, Saitama, JPN.
Abstract:
Purpose To compare intraocular lens (IOL) stability and reversibility in phacovitrectomy with air or gas tamponade between one- and three-piece intraocular lenses (IOLs). Study design This retrospective cross-sectional study was conducted at Saitama Medical University Hospital from January to July 2023. Methods This study involved 19 patients who underwent phacovitrectomy with either air or sulfur hexafluoride gas tamponade and postoperative anterior segment optical coherence tomography. Patients who underwent NSP-3 (NIDEK Co., Ltd., Japan) or NX70s (Santen Pharmaceutical Co., Japan) implantation were evaluated. The displacement force (mN) of the IOL was evaluated in a verification experiment using the NSP-2 (NIDEK Co., Ltd., Japan) and the NX70s. The NSP-2 and NSP-3 share the same lens platform. Results The median age was 66 (58, 77) [median (quartiles)] years for NX70s (n=8) and 67 (55, 71) years for NSP-3 (n=11). The anterior chamber depth (ACD) and IOL position values were substantially elevated after the air or gas disappeared for both IOLs. Comparing the IOLs for the ACD and IOL positions at each time point, no significant difference was found in the ACD and IOL position values in 100% gas or air. However, ACD and IOL position values of the NSP-3 were markedly higher than those of the NX70s in 0% gas or air. In the verification experiment, NSP-2 required a higher IOL displacement force than the NX70s. Following 48 h of 0.5 mm push, the percentage change in the axial distance was smaller for NSP-2 (-6.9%) than for NX70s (-15.5%). Conclusion NSP3 was as stable as NX70s in phacovitrectomy with tamponade and demonstrated better reversibility than NX70s.
