Forward light scatter analysis of the eye in a spatially-resolved double-pass optical system.
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.
Affiliation: School of Optometry, Indiana University, 800 Atwater Avenue, Bloomington, Indiana 47405, USA. firstname.lastname@example.orgShow MeSH
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Mentions: The raw SH spot images g were acquired from human eyes by a 633 nm laboratory aberrometer . The lenslet diameter was 400 microns referenced in the eye’s pupil with the telescope magnification of 1. The camera resolution was 6.8 micron per pixel producing a 59x59 pixel window for each lenslet image. When the tear film forms a smooth surface, individual raw spot images are well focused and appear in a regular array as shown in Fig. 7(a)Fig. 7
Affiliation: School of Optometry, Indiana University, 800 Atwater Avenue, Bloomington, Indiana 47405, USA. email@example.com