A two-layer Shack-Hartmann wavefront sensor model of the human and mouse retinas

Vyas Akondi; Alfredo Dubra

doi:10.1117/12.2583667

5 March 2021 A two-layer Shack-Hartmann wavefront sensor model of the human and mouse retinas

Vyas Akondi, Alfredo Dubra

Proceedings Volume 11623, Ophthalmic Technologies XXXI; 116230D (2021) https://doi.org/10.1117/12.2583667
Event: SPIE BiOS, 2021, Online Only

Abstract

In the ophthalmic Shack-Hartmann wavefront sensor beacon light originates from various depths within the retina. We model the retina of the human and mouse eyes as formed by two backscattering planes, showing that the use of lenslets with low Fresnel number and/or too small search boxes in the centroiding algorithm will produce artifactual aberrations. We evaluate the impact of these errors for four common beacon illumination strategies: full circular, annular, small circular on-axis and small circular off-axis. We find that artifactual aberrations are larger for annular and off-axis beacon illumination, dominated by defocus plus spherical aberration and defocus plus coma, respectively. These artifactual aberrations can be almost completely eliminated by selecting the minimum centroid search box size based on a simple Gaussian optics model and ocular biometry, provided the lenslet Fresnel number is sufficiently large to introduce minimal cross-talk between images of adjacent lenslets.

Conference Presentation

Citation Download Citation

Vyas Akondi and Alfredo Dubra "A two-layer Shack-Hartmann wavefront sensor model of the human and mouse retinas", Proc. SPIE 11623, Ophthalmic Technologies XXXI, 116230D (5 March 2021); https://doi.org/10.1117/12.2583667

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available