Spectroscopic analysis of silicone intraocular lenses by optical transmission measurements and FTIR

Abstract Since the mid-20th century, intraocular lenses (IOLs) have been widely used in cataract surgery to restore vision in patients with refractive issues, replacing the natural lens of the eye. In this study, we spectroscopically characterized silicone IOLs using Fourier Transform Infrared (FTIR) spectroscopy, optical transmission measurements, and wettability investigations after exposing the lenses to UV irradiation for several hours. The results provide valuable insights into the material composition, UV protection, and overall optical quality of IOLs, which are crucial for optimizing and improving the selection of these devices for clinical use. Moreover, the experimental results explain why this material has become less commonly employed for intraocular lenses. Prolonged exposure to UV radiation induces modifications in the surface layers, increasing wettability and compromising optical properties, including a significant reduction in visible light transmittance.