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Improving the performance of multifocal diffractive lens designs by adding a peripheral piston.

Sabyasachi Goswami^1,2, Tianlun Zou^1,3, Sara Aissati¹

¹Center for Visual Science, University of Rochester, New York, USA.

Biomedical Optics Express

|March 20, 2025

Summary

This summary is machine-generated.

Peripheral piston modulation in multifocal lenses may improve distance vision. This study compared piston and non-piston lens designs, finding potential benefits for visual acuity and preference at distance.

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Area of Science:

Ophthalmology
Optical Engineering
Visual Science

Background:

Multifocal intraocular lenses (IOLs) aim to correct vision at multiple distances.
Peripheral optical aberrations can impact visual quality, particularly for distance vision.

Purpose of the Study:

To evaluate the impact of peripheral piston modulation in diffractive multifocal lenses on visual quality.
To compare the performance of lenses with and without peripheral piston designs.

Main Methods:

Optical simulations using an adaptive optics visual simulator.
Comparison of five lens designs: bifocal (BF), bifocal with piston (BFP), trifocal (TF), trifocal with piston (TFP), and refractive (RCN).
Visual performance assessment in eight young subjects with cycloplegia.

Main Results:

Optical simulations indicated enhanced optical quality for distant objects with peripheral pistons.
No compromise in near vision quality was observed with peripheral piston designs.
Trends toward improved high- and low-contrast visual acuity and visual preference scores at distance were noted.

Conclusions:

Peripheral piston modulation in diffractive multifocal lenses shows promise for improving distance vision.
These designs may offer functional and perceptual benefits over conventional non-piston multifocal lenses.