Visual outcomes after progressive apodized diffractive intraocular lens implantation

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Vision Science

Background:

• Cataract surgery requires effective intraocular lens (IOL) implantation for visual restoration.
• Assessing visual function under varying light conditions (photopic and mesopic) is critical for IOL performance evaluation.
• Bifocal intraocular lenses aim to provide clear vision at multiple distances.

Purpose of the Study:

• To evaluate the visual performance of the Bi-Flex® M 677 MY bifocal intraocular lens (IOL).
• To assess photopic (bright light) and mesopic (dim light) vision in patients implanted with this specific IOL.

Main Methods:

• Prospective clinical study involving 25 cataract patients undergoing bilateral IOL implantation.
• Visual acuity (distance, intermediate, near) and contrast sensitivity were measured post-surgery.
• Defocus curves, pupil size, and aberrometric outcomes were analyzed under photopic and mesopic conditions.

Main Results:

• Patients achieved good uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA).
• Adequate intermediate and near visual acuities were recorded.
• Significant differences in defocus curves were noted between photopic and mesopic conditions, with pupil size correlating to dysphotopsia.

Conclusions:

• The Bi-Flex® M 677 MY progressive apodized diffractive IOL effectively restores far and near vision.
• Adequate intermediate visual quality was observed, particularly between -1.00 D and -1.50 D defocus.
• The IOL demonstrates a viable option for visual rehabilitation after cataract surgery.