Intraocular lens bioactivity tested using rabbit corneal tissue cultures

Area of Science:

• Ophthalmology
• Biomaterials Science
• Cell Biology

Background:

• Posterior capsule opacification (PCO) is a common complication after cataract surgery.
• The 'sandwich theory' proposes that PCO is caused by bioactive interactions between the intraocular lens (IOL) and lens epithelial cells.
• Understanding IOL material properties is crucial for preventing PCO.

Purpose of the Study:

• To evaluate the effect of different intraocular lens (IOL) materials on corneal epithelial cell growth.
• To test the bioactivity-based 'sandwich theory' of posterior capsule opacification (PCO).
• To assess the potential of IOL materials to inhibit PCO.

Main Methods:

• Rabbit corneal tissue explants (epithelium and stroma) were cultured on various IOL materials (PMMA, HSM PMMA, silicone, acrylate, hydrogel) for one week.
• Epithelial cell attachment and growth were examined using light microscopy.
• The study evaluated the interaction between corneal tissue and different IOL surfaces.

Main Results:

• All tissue samples exhibited good growth under culture conditions.
• Poor or no attachment of corneal stroma to PMMA, HSM PMMA, silicone, and hydrogel IOLs was observed.
• Acrylate IOLs demonstrated direct attachment of explants to the IOL surface without epithelial ingrowth.

Conclusions:

• The developed tissue culture method effectively assesses corneal tissue behavior on IOL materials.
• Acrylate IOLs exhibit bioactive properties, potentially inhibiting epithelial cell proliferation.
• These findings suggest acrylate IOLs may play a role in preventing PCO, possibly in conjunction with their optic edge design.