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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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The difference of the radial variance maps  for the light scatter between the baseline and TBU data. This map is computed by subtracting Fig. 10(a) from Fig. 10(b) in order to see the optical changes of light scatter caused by the event such as TBU. Some regions have become negative, which indicates that the light scatter could potentially be reduced during the TBU.
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g011: The difference of the radial variance maps for the light scatter between the baseline and TBU data. This map is computed by subtracting Fig. 10(a) from Fig. 10(b) in order to see the optical changes of light scatter caused by the event such as TBU. Some regions have become negative, which indicates that the light scatter could potentially be reduced during the TBU.

Mentions: The post-TBU radial variance maps in Fig. 10(b) can include the scatter of the eye that may not be related to TBU [38]. To see the change in light scatter attributable to TBU, we compute the Post-Pre TBU difference maps (Fig. 11Fig. 11


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)

The difference of the radial variance maps  for the light scatter between the baseline and TBU data. This map is computed by subtracting Fig. 10(a) from Fig. 10(b) in order to see the optical changes of light scatter caused by the event such as TBU. Some regions have become negative, which indicates that the light scatter could potentially be reduced during the TBU.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

g011: The difference of the radial variance maps for the light scatter between the baseline and TBU data. This map is computed by subtracting Fig. 10(a) from Fig. 10(b) in order to see the optical changes of light scatter caused by the event such as TBU. Some regions have become negative, which indicates that the light scatter could potentially be reduced during the TBU.
Mentions: The post-TBU radial variance maps in Fig. 10(b) can include the scatter of the eye that may not be related to TBU [38]. To see the change in light scatter attributable to TBU, we compute the Post-Pre TBU difference maps (Fig. 11Fig. 11

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