Deposit Effects on Plate-haptic Rotationally Asymmetric Refractive Multifocal Intraocular Lens with +1.5D Addition Power.

OBJECTIVE: To evaluate the optical performance of plate-haptic rotationally asymmetric refractive multifocal intraocular lenses (IOLs) with +1.5 D addition power by reproducing calcium deposition using rabbit eyes.

METHODS: Five IOLs (LS-313 MF15 [Santen/Teleon], W-60R [Santen], NS1 [KOWA], SY60WF [Alcon], and NS-60YS [NIDEK]) with varying water content were randomly implanted in rabbit eyes. Cell proliferation in the lens capsule and deposits on the IOL surface were confirmed with a slit lamp. The surface deposits were stained with alizarin red, and IOL transmittance was measured with a spectrophotometer. IOL storage solutions were analyzed using inductively coupled plasma mass spectrometry to confirm the presence of calcium.

RESULTS: Slit-lamp observations revealed abundant cellular proliferation on all IOLs. Granular deposits, unlike proliferating cells, were observed on LS-313 MF15 lenses two months after surgery, increasing over time, and stained red. The transmittance of LS-313 MF15 decreased in correlation with the stained area. Calcium was detected in all IOL storage solutions; however, deposits were confirmed only on the LS-313 MF15 surface, indicating decreased transmittance.

CONCLUSION: These findings can facilitate predicting deposition on IOLs in clinical settings and selecting IOL materials for long-term stability. The long-term use of LS-313 MF15 IOLs requires further verification to avoid post-surgical extraction.