Background: Indomethacin (IND) is a class of non-steroidal, anti-inflammatory
drugs, which is used to treat various kinds of ocular inflammation, and has been reported to
prevent posterior capsule opacification (PCO) by inhibiting the mitosis and collagen synthesis
of human lens epithelial cells (LECs). In addition, the specific absorption spectrum of indomethacin
shows the effect of absorbing short-wavelength blue-violet light.
Objective: We prepared an indomethacin-loaded hydrogel as a potential intraocular lens (IOLs)
material to prevent endophthalmitis, PCO and filter harmful blue light.
Methods: Indomethacin prodrugs (HEMA-IND) (HI) were prepared by esterification of indomethacin
and 2-hydroxyethyl methacrylate (HEMA), and poly (HEMA-co-MAA-co-MMA-co-
HI) (HAMI) hydrogels were prepared by free-radical polymerization of 2-hydroxyethyl methacrylate
(HEMA), methyl methacrylate (MMA), methacrylic acid (MAA) and HI. The physical
and chemical properties of obtained hydrogel were detected, including optical, morphology,
thermomechanical and surface properties, equilibrium water content, drug release behaviors and
Results: HAMI hydrogels can filter harmful short-wavelength blue light and show other necessary
properties like visible light transparency, glass transition temperatures, mechanical
strength, and biocompatibility for making intraocular lenses. Meanwhile, MAA increases the
hydrophilicity of the hydrogels, resulting in a lower water contact angle and controllable drug
release from the hydrogels.
Conclusion: In summary, HAMI hydrogels show a great potential as IOL biomaterials that can
maintain the sustained release of indomethacin and filter harmful blue light after cataract surgery.
Lay Summary: People with cataract surgery can be at high risk of postoperative complications,
such as PCO and postoperative endophthalmitis. Moreover, early IOLs allowed all ultraviolet
(UV) and visible light to pass through retina without restriction, thus to damage the retina and
the retinal pigment epithelium, which may lead to retinopathy and age-related macular degeneration
(AMD). Herein, we sought to design and prepare a kind of IOLs loaded with indomethacin
to mitigate those postoperative complications and filter harmful blue light to improve the