Analysis of the visual function with the continuous transitional focus intraocular lens Precizon Presbyopic

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Optics

Background:

• Presbyopia-correcting intraocular lenses (IOLs) aim to restore functional vision at multiple distances.
• Understanding the influence of patient-specific factors, like pupil dynamics, is crucial for optimizing IOL outcomes.

Purpose of the Study:

• To evaluate the clinical performance of a refractive multi-segmented continuous transitional focus intraocular lens (IOL).
• To assess the impact of patient pupil dynamics on the visual outcomes of this presbyopia-correcting IOL.

Main Methods:

• Retrospective analysis of 40 eyes implanted with the Precizon Presbyopic IOL.
• Evaluation of visual acuity (distance, intermediate, near), contrast sensitivity, and binocular defocus curves.
• Assessment of visual disturbances using a validated questionnaire and correlation with pupil size (photopic and mesopic).

Main Results:

• Excellent binocular visual acuities achieved: UDVA -0.09, DCIVA 0.04, UNVA 0.17, DCNVA 0.15 logMAR.
• Good visual acuity maintained across a range of defocus levels (+1.50 to -3.00 D).
• Mesopic pupil size showed moderate correlation with visual acuity at certain negative defocus levels; photopic pupil size did not significantly correlate. Minimal differences in contrast sensitivity between mesopic and photopic conditions were observed. 10% reported starbursts, but 90% achieved spectacle independence.

Conclusions:

• The Precizon Presbyopic IOL effectively restores vision across multiple distances with high visual quality.
• Visual outcomes are minimally influenced by pupil dynamics, suggesting broad applicability.
• The IOL offers a high degree of spectacle independence, indicating successful functional vision restoration.