Antibacterial Nanopillar Array for an Implantable Intraocular Lens

Area of Science:

• Biomaterials Science
• Ophthalmology
• Nanotechnology

Background:

• Post-surgical intraocular lens (IOL) infections pose a significant risk of blindness.
• Current treatments often require secondary surgeries to replace contaminated IOLs.
• Preventing bacterial adhesion and proliferation on IOL surfaces is crucial for patient outcomes.

Purpose of the Study:

• To develop a novel antibacterial surface modification for IOLs.
• To create a nanopillar array (NPA) integrated onto IOLs capable of capturing and eradicating bacteria.
• To evaluate the efficacy and safety of the modified IOL surface.

Main Methods:

• Fabrication of a polymeric nanopillar array (NPA) on an IOL surface.
• Application of an ionic antibacterial polymer layer using initiated chemical vapor deposition.
• Modification of NPA dimensions and polymer coating for enhanced antibacterial activity and reduced cell adhesion.
• Testing antibacterial efficiency against Staphylococcus aureus.

Main Results:

• The developed ionic polymer-coated NPA demonstrated over 99% antibacterial efficiency against Staphylococcus aureus.
• The NPA effectively captures and ruptures bacterial membranes through mechanical and chemical interactions.
• The surface modification reduced corneal endothelial cell adhesivity and posterior capsule opacification without cytotoxicity.

Conclusions:

• The novel ionic polymer-coated NPA offers an effective strategy to prevent bacterial contamination of IOLs.
• This technology has the potential to significantly reduce postoperative complications like endophthalmitis after cataract surgery.
• The approach combines topological and physicochemical surface modifications for enhanced antibacterial performance.