Distortions, related to astigmatism , that cause the inability of light rays entering the eye to converge (come together) to a single focus point on the retina . Aberration are divided into two main categories: higher-order and lower-order. Optical system image defects; rays of light emanating from an object-point fail to form a perfect image-point.

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Aberrations of the eye

Eye aberrations

Aberrations of the eye – an overview — ScienceDirect Topics

Higher-Order Aberrations in the Eye – AllAboutVision.com

Diopters, Aberration, and the Human Eye (video) — Khan Academy

Optical aberrations and alignment of the eye with age — JOV — ARVO Journals

OSA — Chromatic aberration correction of the human eye for retinal imaging in the near infrared

Dynamics of the eye’s wave aberration. – PubMed – NCBI

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