Initial experience with an accommodating intraocular lens: controlled prospective study

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Vision Science

Background:

• Presbyopia affects near vision, necessitating reading aids or surgical correction.
• Cataract surgery often results in a loss of accommodation.
• Accommodating intraocular lenses (IOLs) aim to restore near and distance vision after cataract removal.

Purpose of the Study:

• To evaluate the visual outcomes and patient satisfaction following the implantation of an accommodating intraocular lens (IOL) in presbyopic eyes.
• To assess the efficacy of the Crystalens AT-45 IOL in improving both distance and near visual acuities.

Main Methods:

• A prospective controlled trial involving phacoemulsification and implantation of a Crystalens AT-45 accommodating IOL.
• Evaluation of uncorrected and corrected distance visual acuity (UDVA and CDVA), manifest refraction, and patient satisfaction.
• Statistical analysis using Student t, paired-sample t tests, and analysis of variance (ANOVA) for preoperative and postoperative comparisons.

Main Results:

• 92% of eyes achieved an uncorrected distance visual acuity (UDVA) of 6/12 or better at 6 months postoperatively.
• All eyes achieved a corrected distance visual acuity (CDVA) of 6/12 or better.
• Significant improvement in distance-corrected near visual acuity (DCNVA) was observed, with over 60% of eyes achieving J3 or better from 1 month onwards.

Conclusions:

• The accommodating IOL demonstrated potential for providing functional near and distance vision for daily activities.
• Surgeon experience and improved IOL calculation methods are crucial for maximizing visual outcomes.
• Further research is warranted to optimize the use of accommodating IOLs in managing presbyopia.