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Method to reduce undesired multiple fundus scattering effects in double-pass systems.

Carlos E García-Guerra, Joan A Martínez-Roda, Mikel Aldaba

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    |May 3, 2019
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    This study introduces a method to improve double-pass optical quality measurements of the eye by reducing image degradation from fundus scattering. Simultaneous measurements in symmetric and asymmetric configurations effectively suppress scattering effects for accurate eye assessment.

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    Area of Science:

    • Ophthalmology
    • Optical Engineering
    • Biomedical Optics

    Background:

    • Double-pass (DP) systems measure eye optical quality via fundus backscattering.
    • Multiple scattering in the ocular fundus degrades DP image quality.
    • Accurate optical quality assessment is crucial for understanding visual function.

    Purpose of the Study:

    • To develop and validate a method for reducing image degradation in DP measurements caused by fundus scattering.
    • To improve the reliability of DP systems for assessing the optical quality of the human eye.

    Main Methods:

    • Implementing combined data processing from simultaneous DP measurements.
    • Utilizing two configurations: symmetric (equal entrance/exit pupils) and asymmetric (unequal entrance/exit pupils).
    • Analyzing the suppression of multiple scattering effects under specific conditions.

    Main Results:

    • The proposed method effectively suppresses undesired multiple scattering effects.
    • Measurements in human eyes demonstrate the successful reduction of image degradation.
    • Despite scattering-induced shifts, DP systems remain viable for population-based optical quality prediction.

    Conclusions:

    • The combined data processing method enhances the accuracy of DP measurements by mitigating fundus scattering.
    • This technique improves the utility of DP systems for clinical and research applications in ophthalmology.
    • Accurate optical quality assessment is achievable within populations using refined DP methodologies.