CASPIAN JOURNAL
MANAGEMENT AND HIGH TECHNOLOGIES
Methods of self-mixing signal analysis for measurement intraocular pressure
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Read | Usanov Dmitriy A., Skripal Anatoliy V., Usanova Tatyana B., Dobdin Sergey Yu., Astakhov Elisey I. Methods of self-mixing signal analysis for measurement intraocular pressure // Caspian journal : management and high technologies. — 2014. — №4. — pp. 204-212. |
Usanov Dmitriy A. - D.Sc. (Physics and Mathematics), Professor, Saratov State University named after N.G. Chernyshevsky, 83 Astrakhanskaya St., Saratov, 410012, Russian Federation, usanovDA@info.sgu.ru
Skripal Anatoliy V. - D.Sc. (Physics and Mathematics), Professor, Saratov State University named after N.G. Chernyshevsky, 83 Astrakhanskaya St., Saratov, 410012, Russian Federation, skripalav@info.sgu.ru
Usanova Tatyana B. - Ph.D. (Physics and Mathematics), ophthalmologist, Saratov State University named after N.G. Chernyshevsky, 83 Astrakhanskaya St., Saratov, 410012, Russian Federation, UsanovDA@info.sgu.ru
Dobdin Sergey Yu. - Ph.D. (Physics and Mathematics), Associate Professor, Saratov State University named after N.G. Chernyshevsky, 83 Astrakhanskaya St., Saratov, 410012, Russian Federation, sergant1986@ya.ru
Astakhov Elisey I. - post-graduate student, Saratov State University named after N.G. Chernyshevsky, 83 Astrakhanskaya St., Saratov, 410012, Russian Federation, elisey.astakhov@gmail.com
The article represents methods of self-mixing signal analysis for measurement intraocular pressure using semiconductor laser. Intraocular pressure has been determined from the analysis of the restored motion parameters of a scleral layer of the eye, under pneumatic impulse influence. Two methods of self-mixing signal analysis have been used to measure the intraocular pressure: the restoration of the motion function of scleral layer of the eye using inverse function and, for comparison, the restoration of the motion function of scleral layer of the eye using direct and indirect wavelet-transformations of self-mixing signal. In the result of self-mixing signal analysis, the ration between the deflection of scleral layer and acceleration has been determined. The conduct analysis allowed setting a relationship between the ration of the deflection of scleral layer to acceleration and intraocular pressure, measured using serial produced noncontact pneumatic tonometer. For measurement intraocular pressure, using represented methods, the device has been designed. The deviСЃe allows to measure the deflection of scleral layer of the eye with micron resolution under pneumatic impulse influence.
Key words: внутриглазное давление, биомеханика глаза, лазерная система, автодинный сигнал, интерференционный сигнал, внешняя оптическая обратная связь, компьютерное моделирование, intraocular pressure, biomechanics of the eye, laser system, autodyne signal, interfer