Journal ArticleDOI
Anatomically accurate, finite model eye for optical modeling
Hwey-Lan Liou,Noel A. Brennan +1 more
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TLDR
The new model eye provides spherical aberration values within the limits of empirical results and predicts chromatic aberration for wavelengths between 380 and 750 nm and provides a model for calculating optical transfer functions and predicting optical performance of the eye.Abstract:
There is a need for a schematic eye that models vision accurately under various conditions such as refractive surgical procedures, contact lens and spectacle wear, and near vision. Here we propose a new model eye close to anatomical, biometric, and optical realities. This is a finite model with four aspheric refracting surfaces and a gradient-index lens. It has an equivalent power of 60.35 D and an axial length of 23.95 mm. The new model eye provides spherical aberration values within the limits of empirical results and predicts chromatic aberration for wavelengths between 380 and 750 nm. It provides a model for calculating optical transfer functions and predicting optical performance of the eye.read more
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Journal ArticleDOI
Split-spectrum amplitude-decorrelation angiography with optical coherence tomography
Yali Jia,Ou Tan,Jason Tokayer,Benjamin Potsaid,Y. Wang,Jonathan J. Liu,Martin F. Kraus,Hrebesh M. Subhash,James G. Fujimoto,Joachim Hornegger,David Huang +10 more
TL;DR: In this paper, a split-spectrum amplitude-decorrelation angiography (SSADA) was proposed to improve the signal-to-noise ratio (SNR) of flow detection.
Journal Article
Split-spectrum amplitude-decorrelation angiography with optical coherence tomography
Yali Jia,Ou Tan,Jason Tokayer,Benjamin Potsaid,Y. Wang,Jonathan J. Liu,Martin F. Kraus,Hrebesh M. Subhash,James G. Fujimoto,Joachim Hornegger,David Huang +10 more
TL;DR: In this paper, a split-spectrum amplitude-decorrelation angiography (SSADA) was proposed to improve the signal-to-noise ratio (SNR) of flow detection.
Journal ArticleDOI
The shape of the anterior and posterior surface of the aging human cornea.
TL;DR: The shape of the anterior corneal surface provides no definitive basis for knowing the asphericity of the posterior surface and the results show the effective refractive index is 1.329, which is lower than values commonly used.
Journal ArticleDOI
Off-axis aberrations of a wide-angle schematic eye model.
TL;DR: The model has been applied to simulate a variety of experimental methods in which image aberrations are estimated from measurements taken in the object space and the results suggest that for some types of aberration, these methods may yield biased estimates.
Journal ArticleDOI
Corneal wave aberration from videokeratography: accuracy and limitations of the procedure.
Antonio Guirao,Pablo Artal +1 more
TL;DR: The procedure permits estimation of the corneal wave aberration from videokeratoscopic data with an accuracy of 0.05-0.2 microm, rendering the method adequate for many applications.
References
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Journal ArticleDOI
Accommodation-dependent model of the human eye with aspherics
TL;DR: The average spherical aberration of the actual eye is predicted without any shape fitting by introducing recent experimental average measurements of cornea and lens into the Gullstrand-Le Grand model.
Journal ArticleDOI
The chromatic eye: a new reduced-eye model of ocular chromatic aberration in humans
TL;DR: The reduced eye was further modified by changing the refracting surface to an aspherical shape to reduce the amount of spherical aberration, providing an improved account of both the longitudinal and transverse forms of ocular chromatic aberration.
Journal ArticleDOI
The Mean Shape of the Human Cornea
TL;DR: Results of the fitting of a conicoid equation to corneal shape data derived from a precision photokeratoscope show that the cornea is significantly asymmetric in both radius of curvature and asphericity.
The mean shape of the human cornea
TL;DR: In this paper, the authors presented results of the fitting of a conicoid equation to corneal shape data derived from a precision photokeratoscope and showed that the cornea is significantly asymmetric in both radius of curvature and asphericity.