Clinical application of red and green laser retinometer for cataracts of various etiology using speckle technologies

Garif G. Akchurin; Valery V. Bakutkin; Dmitry A. Zimnyakov; Elena Yu. Radchenko; Valery V. Tuchin

doi:10.1117/12.429282

7 June 2001 Clinical application of red and green laser retinometer for cataracts of various etiology using speckle technologies

Garif G. Akchurin, Valery V. Bakutkin, Dmitry A. Zimnyakov, Elena Yu. Radchenko, Valery V. Tuchin

Author Affiliations +

Proceedings Volume 4245, Ophthalmic Technologies XI; (2001) https://doi.org/10.1117/12.429282
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

Measurement of retinal visual acuity in 230 patient with different types of cataract (senile, posterior capsular, nuclear, complicated) before and after extraction has shown high correlation between these values. Double `red' (He-Ne (lambda) equals 633 nm or diode laser GaAlAs (lambda) equals 630 - 650 nm) and `green' (YAG:Nd laser (lambda) equals 532 nm) retinometer has allowed to determinate the angle of resolution of the retina practically for all types of cataract. Applied speckle-technologies have permitted the range of retinal angular resolution to be estimated with the help of laser retinometer at the stage of preoperative cataract diagnosis. Speckle-modulated laser fields arising at in vitro measurements of different types of human cataracts lenses have been investigated experimentally. Computer analysis of digital images has allowed to estimate of destruction of the spatial coherence of a laser beam scattered by a turbid lens. Effect of saturation of the average speckles size in multiple-scattering biotissues gives good opportunities to determine preoperative retinal visual acuity for any type of cataracts in vivo.

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Garif G. Akchurin, Valery V. Bakutkin, Dmitry A. Zimnyakov, Elena Yu. Radchenko, and Valery V. Tuchin "Clinical application of red and green laser retinometer for cataracts of various etiology using speckle technologies", Proc. SPIE 4245, Ophthalmic Technologies XI, (7 June 2001); https://doi.org/10.1117/12.429282

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KEYWORDS

Laser scattering

Scattering

Lenses

Eye

Opacity

Retina

Visualization

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