Open-capsule intraocular lens to prevent posterior capsule opacification

Area of Science:

• Ophthalmology
• Biomaterials Science
• Surgical Innovation

Background:

• Posterior capsule opacification (PCO) remains a common complication after cataract surgery.
• Current intraocular lens (IOL) designs may not fully prevent PCO.
• Small incision cataract surgery necessitates foldable IOLs that can be inserted with minimal trauma.

Purpose of the Study:

• To develop and evaluate a single-piece, open-capsule intraocular lens (IOL).
• To assess the IOL's ability to prevent posterior capsule opacification (PCO).
• To determine if the IOL can be inserted through a small corneal incision.

Main Methods:

• A prototype open-capsule IOL was fabricated from hydrophobic acrylic material.
• The IOL design features a spacer and perforations to facilitate aqueous humor circulation.
• The prototype IOL and a control IOL (NY-60) were implanted in rabbit eyes, with PCO evaluated via histopathology.

Main Results:

• The open-capsule IOL was successfully inserted through a 3.2 mm corneal incision.
• The mean posterior capsule cell layer thickness was significantly reduced in the open-capsule IOL group (4.78 μm) compared to the control group (101.14 μm).
• Histopathological analysis confirmed a substantial decrease in PCO in eyes with the open-capsule IOL.

Conclusions:

• The developed single-piece, open-capsule IOL is implantable through a small incision.
• This novel IOL design effectively prevents PCO by maintaining capsular bag expansion and aqueous humor circulation.
• The findings suggest a promising new approach for mitigating PCO in intraocular lens surgery.