Implementation of the frequency scatter index in clinical commercially available double-pass systems
Visualitza/Obre
10.1080/02713683.2021.2002908
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/360977
Tipus de documentArticle
Data publicació2022-03
Condicions d'accésAccés obert
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Abstract
A previous work has reported a methodology to quantify intraocular scattering using a high sensitivity double-pass instrument with a robust index, the frequency scatter index. The purpose of our study was to evaluate an adaptation of the frequency scatter index for use in clinical double-pass systems. A prospective observational study was carried out in a group of patients with nuclear cataracts (n = 52) and in a control group (n = 11) using conventional double-pass systems. The frequency scatter index and the objective scatter index were used to assess the scattering. The Spearman coefficient was calculated to assess the correlation between both indexes, obtained from the double-pass images. Simultaneous measurements were performed with a double-pass and with a Hartmann-Shack wavefront sensor in the control group. The root-mean-square wavefront error and the full width at half maximum of the double-pass image were used to quantify the residual aberrations introduced by the variations in pupil size and retinal eccentricity. Measurement in eyes with different grades of cataracts shows a strong correlation (¿ = 0.929, p < .0001) between the frequency scatter index and the objective scatter index. A certain degree of correlation was observed between the objective scatter index and the root-mean-square and between the objective scatter index and the full width at half maximum, both for measurements with a different pupillary diameter and with a different retinal eccentricity (p < .05). No relationship was observed between the frequency scatter index and the root-mean-square or between the frequency scatter index and the full width at half maximum (p > .05). We have introduced and evaluated an adaptation of a methodology proposed recently for the measurement of intraocular scattering using the double-pass technique with a robust index, which is less affected by ocular aberrations. The frequency scatter index can be applied to conventional double-pass instruments available in clinical environments.
CitacióSánchez, R. [et al.]. Implementation of the frequency scatter index in clinical commercially available double-pass systems. "Current eye research", Març 2022 vol. 47, num. 3, p. 391-398.
ISSN0271-3683
Versió de l'editorhttps://www.tandfonline.com/doi/full/10.1080/02713683.2021.2002908
Fitxers | Descripció | Mida | Format | Visualitza |
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Frequency Scatter Index.pdf | 1,057Mb | Visualitza/Obre |