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- W1994133766 abstract "Purpose To determine whether an unmodified commercial wavefront aberrometer (irx3) can be used to estimate forward light scattering and how this assessment matches estimations obtained from the C-Quant straylight meter. Setting University of Manchester, Manchester, United Kingdom. Design Prospective comparative study. Methods Measurements obtained with a straylight meter and with Shack-Hartmann spot patterns using a previously reported metric were compared. The method was first validated in a model eye by spraying an aerosol over 4 contact lenses to generate various levels of scattering. Measurements with both methods were subsequently obtained in healthy eyes. Results The study comprised 33 healthy participants (mean age 38.9 years ± 13.1 [SD]). A good correlation was observed between the density of droplets over the contact lenses and the objective scatter value extracted from the hartmanngrams (r = 0.972, P < .05). However, in eyes of subjects, no significant relationship was found between measurements from the straylight meter and the metric derived from the Shack-Hartmann method (r = 0.133, P = .460). Conclusions The hartmanngrams provided a valid objective measurement of the light scatter in a model eye; the measurements in human eyes were not significantly correlated with those of the light scatter meter. The straylight meter assesses large-angle scattering, while the Shack-Hartmann method collates information from a narrow angle around the center of the point-spread function; this could be the reason for the difference in measurements. Financial Disclosure No author has a financial or proprietary interest in any material or method mentioned." @default.
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- W1994133766 date "2015-02-01" @default.
- W1994133766 modified "2023-10-18" @default.
- W1994133766 title "Comparison of forward light scatter estimations using Shack-Hartmann spot patterns and a straylight meter" @default.
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- W1994133766 doi "https://doi.org/10.1016/j.jcrs.2014.04.042" @default.
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