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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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Related in: MedlinePlus

An example of the simulated spot images generated by macro-aberrations. (a) the modal wavefront, (b) the zonal wavefront. When the wavefront slopes in two neighboring lenslets differ and therefore the local wavefront forms a cusp between them. A finite sampling of such zonal macro-aberrations may demonstrate double spots in one lenslet (Fig. 4(b)).
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g004: An example of the simulated spot images generated by macro-aberrations. (a) the modal wavefront, (b) the zonal wavefront. When the wavefront slopes in two neighboring lenslets differ and therefore the local wavefront forms a cusp between them. A finite sampling of such zonal macro-aberrations may demonstrate double spots in one lenslet (Fig. 4(b)).

Mentions: Macro-aberrations were represented by wavefronts constructed by either modal or zonal methods (Fig. 4Fig. 4


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)

An example of the simulated spot images generated by macro-aberrations. (a) the modal wavefront, (b) the zonal wavefront. When the wavefront slopes in two neighboring lenslets differ and therefore the local wavefront forms a cusp between them. A finite sampling of such zonal macro-aberrations may demonstrate double spots in one lenslet (Fig. 4(b)).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

g004: An example of the simulated spot images generated by macro-aberrations. (a) the modal wavefront, (b) the zonal wavefront. When the wavefront slopes in two neighboring lenslets differ and therefore the local wavefront forms a cusp between them. A finite sampling of such zonal macro-aberrations may demonstrate double spots in one lenslet (Fig. 4(b)).
Mentions: Macro-aberrations were represented by wavefronts constructed by either modal or zonal methods (Fig. 4Fig. 4

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