Design concepts for advanced-technology intraocular lenses [Invited]

Area of Science:

• Ophthalmology
• Optical Engineering
• Biomedical Engineering

Background:

• Cataract surgery commonly involves intraocular lens (IOL) implantation to restore vision.
• While standard IOLs offer simple optics, advanced technology IOLs incorporate multifocal or extended depth of focus (EDOF) features.
• Patient visual needs and tolerance for optical side effects vary significantly.

Purpose of the Study:

• To evaluate optical concepts of advanced technology IOLs.
• To analyze image contrast, focal range, and visual phenomena associated with different IOL designs.
• To explore design strategies for optimizing visual outcomes in cataract patients.

Main Methods:

• Review of optical principles for multifocal and EDOF IOLs.
• Comparison of visual performance metrics including image contrast and focal range.
• Assessment of visual phenomena related to diffractive and refractive IOL designs.

Main Results:

• Diffractive designs (bifocal, trifocal) were developed to address visual needs but can cause visual phenomena.
• Refractive methods for monofocal IOLs aim to increase depth of focus with potentially fewer visual side effects.
• IOL designs present a spectrum of options balancing visual range and optical quality.

Conclusions:

• Advanced IOL designs offer tailored visual solutions for cataract patients.
• Consideration of patient-specific needs and sensitivity to visual side effects is crucial for IOL selection.
• Ongoing innovation in IOL optics seeks to enhance visual function while minimizing undesirable visual phenomena.