Least-squares fitting of Hartmann or Shack–Hartmann data with a circular array of sampling points

Malacara-Hernández, Zacarías; Malacara-Doblado, Daniel; Malacara-Hernández, Daniel

doi:10.1364/ao.54.00e113

Cited by 9 publications

(1 citation statement)

References 3 publications

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“…According to the article presented by Malacara et al, a four-point array provides enough information to detect fundamental frequency components (low-order aberrations) [ 50 ]. However, limited information is available to detect second harmonic components (high order aberrations).…”

Section: Resultsmentioning

confidence: 99%

Measurement of Longitudinal Chromatic Aberration in the Last Crystalline Lens Surface Using Hartmann Test and Purkinje Images

Calderon-Uribe

Hernández-Gómez

Gómez-Vieyra

2022

Sensors

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Research has shown that longitudinal chromatic aberration (LCA) of the human eye is generated across all of the eye’s optical surfaces. However, it may not be necessary to measure the LCA from the first surface of the cornea to the retina, as it is known that most of the changes that can modify the path of light occur from the first surface of the cornea to the last surface of the crystalline lens. This investigation presents the study of an objective technique that allows the measurement of longitudinal chromatic aberration (LCA) on the last crystalline lens surface by developing a pulse width wavefront system using a Hartmann test, Purkinje image, and Zernike polynomial. A blue pulse (440–480 nm) and a red pulse (580–640 nm) were used to generate a pattern of spots in the human eye. This pattern generated on the posterior surface of the crystalline lens of the human eye allows the reconstruction of the wavefront via a modal method with Zernike polynomials. Once the wavefront is reconstructed, Zernike coefficients can be used to quantify the LCA. The methodology and objective measurements of the magnitude of the longitudinal chromatic aberration of five test subjects are explained in this article.

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Section: Resultsmentioning

confidence: 99%