Accommodation amplitudes after an accommodating intraocular lens refilling procedure: in vivo update

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Materials Science

Background:

• Cataract surgery often results in loss of accommodation.
• New intraocular lens (IOL) technologies aim to restore visual function.
• Accommodating-IOLs seek to mimic the natural eye's ability to focus.

Purpose of the Study:

• To evaluate a novel capsular bag-refilling procedure for inducing accommodation in monkey eyes.
• To assess the impact of different silicone polymer volumes on accommodation amplitude.
• To determine the safety and efficacy of this technique in a preclinical model.

Main Methods:

• Phacoemulsification and implantation of an accommodating-membrane IOL were performed.
• Silicone polymers were injected into the capsular bag in three different volumes (65%, 80%, 100% bag volume).
• Accommodation was measured using automated refractometry before and after pilocarpine administration, 4 weeks postoperatively.

Main Results:

• The capsular bag-refilling technique was successful in all subjects without polymer leakage.
• Mean accommodation amplitudes ranged from 2.42 to 2.71 diopters across the study groups.
• No anterior capsule opacification in the visual axis was observed.

Conclusions:

• The capsular bag-refilling procedure demonstrated the ability to provide some degree of accommodation in monkey eyes.
• The technique successfully prevented polymer leakage and anterior capsule opacification.
• Further research is warranted to explore the clinical applicability of this accommodating IOL approach.