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Related Concept Videos

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

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Peripheral refractive errors in pseudophakic eyes: in vitro evaluation and optical simulation.

D Romashchenko1, A Del Aguila1, M State1

  • 1Johnson & Johnson MedTech, Van Swietenlaan 5, 9728NX, Groningen, The Netherlands.

Biomedical Optics Express
|May 11, 2026
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Summary

Peripheral refractive errors in pseudophakic eyes were assessed. All intraocular lens (IOL) models showed similar peripheral cylinder, indicating consistent optical performance across different IOL types and technologies.

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Area of Science:

  • Ophthalmology
  • Optical Engineering
  • Biomedical Optics

Background:

  • Pseudophakic eyes, those with an implanted intraocular lens (IOL), can experience peripheral refractive errors.
  • Understanding these errors is crucial for optimizing visual quality after cataract surgery.

Purpose of the Study:

  • To systematically assess peripheral refractive errors, specifically peripheral cylinder, in pseudophakic eyes.
  • To compare the peripheral optical performance of various intraocular lens (IOL) types and technologies.

Main Methods:

  • Optical bench measurements using a physical eye model with eight different IOL models (20 D approximate power).
  • Inclusion of various IOL types (monofocal, EDOF, multifocal) and technologies (refractive, diffractive, wavefront-shaping).
  • Optical simulations performed on average and personalized pseudophakic eye models.

Main Results:

  • Peripheral cylinder at a 20° visual field was consistent across all tested IOLs, ranging from -2.24 to -2.87 D.
  • Simulations indicated peripheral cylinder was largely independent of pupil size, retinal radius of curvature (ROC), and IOL technology in average eye models.
  • Peripheral blur showed minor variations with IOL technology and ROC but was minimally affected by pupil size.

Conclusions:

  • The peripheral optical performance, particularly peripheral cylinder, is comparable across a wide range of modern intraocular lens (IOL) technologies.
  • IOL technology and eye-specific parameters have a limited impact on peripheral cylinder and blur in pseudophakic eyes.