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Forward light scatter analysis of the eye in a spatially-resolved double-pass optical system.

Nam J, Thibos LN, Bradley A, Himebaugh N, Liu H - Opt Express (2011)

Bottom Line: An optical analysis is developed to separate forward light scatter of the human eye from the conventional wavefront aberrations in a double pass optical system.We prove an additivity property for radial variance that allows us to distinguish between spot blurs from macro-aberrations and micro-aberrations.When the method is applied to tear break-up in the human eye, we find that micro-aberrations in the second pass accounts for about 87% of the double pass image blur in the Shack-Hartmann wavefront aberrometer under our experimental conditions.

View Article: PubMed Central - PubMed

Affiliation: School of Optometry, Indiana University, 800 Atwater Avenue, Bloomington, Indiana 47405, USA. jnam@indiana.edu

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A schematic diagram for the double pass optical model for the human eye. R: the retinal beacon, h: PSF of the eye + the miniature optical system over each subaperture of the lenslet array. h is modeled as a convolution of PSF due to macro-aberrations (h0) and PSF due to micro-aberrations (hs). The SH spot image of R formed by each subaperture is denoted by g.
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g003: A schematic diagram for the double pass optical model for the human eye. R: the retinal beacon, h: PSF of the eye + the miniature optical system over each subaperture of the lenslet array. h is modeled as a convolution of PSF due to macro-aberrations (h0) and PSF due to micro-aberrations (hs). The SH spot image of R formed by each subaperture is denoted by g.

Mentions: In the first pass, the narrow beam of light comes into the eye and forms an image R on the retina (Fig. 3Fig. 3


Forward light scatter analysis of the eye in a spatially-resolved double-pass optical system.

Nam J, Thibos LN, Bradley A, Himebaugh N, Liu H - Opt Express (2011)

A schematic diagram for the double pass optical model for the human eye. R: the retinal beacon, h: PSF of the eye + the miniature optical system over each subaperture of the lenslet array. h is modeled as a convolution of PSF due to macro-aberrations (h0) and PSF due to micro-aberrations (hs). The SH spot image of R formed by each subaperture is denoted by g.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3368325&req=5

g003: A schematic diagram for the double pass optical model for the human eye. R: the retinal beacon, h: PSF of the eye + the miniature optical system over each subaperture of the lenslet array. h is modeled as a convolution of PSF due to macro-aberrations (h0) and PSF due to micro-aberrations (hs). The SH spot image of R formed by each subaperture is denoted by g.
Mentions: In the first pass, the narrow beam of light comes into the eye and forms an image R on the retina (Fig. 3Fig. 3

Bottom Line: An optical analysis is developed to separate forward light scatter of the human eye from the conventional wavefront aberrations in a double pass optical system.We prove an additivity property for radial variance that allows us to distinguish between spot blurs from macro-aberrations and micro-aberrations.When the method is applied to tear break-up in the human eye, we find that micro-aberrations in the second pass accounts for about 87% of the double pass image blur in the Shack-Hartmann wavefront aberrometer under our experimental conditions.

View Article: PubMed Central - PubMed

Affiliation: School of Optometry, Indiana University, 800 Atwater Avenue, Bloomington, Indiana 47405, USA. jnam@indiana.edu

Show MeSH
Related in: MedlinePlus