Ultrasonic measurement of binocular longitudinal corneal apex movements and their correlation to cardiopulmonary system

• Autorzy: Kowalska M. A. , Kasprzak H. T. , Iskander D. R.
• Języki publikacji: EN

Abstrakty

EN

The characteristics of binocular axial eye movements are of interest in studies of eye biomechanics and vision. Current techniques that are used to evaluate such movements were found to be of insufficient resolution. Here, synchronised measurements of binocular eye movements with custom designed high resolution ultrasound transducers, and cardiac electric cycle were considered. The mechanical and electrical signals were examined using spectral, time-frequency, and coherence analyses. The results showed that a close correlation and intricate phase relationships exist between longitudinal eye movements and cardiopulmonary signals. Understanding these relationships could provide a better insight on interactions between eye biomechanics and vision.

Słowa kluczowe

EN

longitudinal corneal apex movements; cardiopulmonary system; ultrasonic distance sensor; spectral analysis; coherence function

PL

układ krążeniowo-oddechowy; odległość; czujnik ultradźwiękowy; analiza widmowa; funkcja koherencji

• Wydawca: Nałęcz Institute of Biocybernetics and Biomedical Engineering of the Polish Academy of Sciences ; Elsevier
• Czasopismo: Biocybernetics and Biomedical Engineering
• Rocznik: 2008
• Tom: Vol. 28, no. 3
• Strony: 35--43
• Opis fizyczny: Bibliogr. 17 poz., rys., wykr.

Twórcy

autor

Kowalska M. A.

autor

Kasprzak H. T.

autor

Iskander D. R.

• Institute of Physics, Wrocław University of Technology, Wybrzeże S. Wyspiańskiego 27, 50-370 Wrocław, Poland,

Bibliografia

• 1. Kowler E. (Ed.): Eye movements and their role in visual and cognitive processes, Volume 4, Reviews of Oculomotor Research, Elsevier Science Publishers, Amsterdam 1990.
• 2. Coakley D.: Minute eye movement and brain stem function. CRC Press, Boca Raton, FL, 1990.
• 3. Guitton D., Volle M.: Gaze control in humans: eye-head coordination during orienting movements to targets within and beyond the oculomotor range, J. Neurophysiol. 1987, 58, 427-459.
• 4. Goossens H.H.L.M., Van Opstal A.J.: Human eye-head coordination in two dimensions under different sensorimotor conditions, Exp. Brain Res. 1997, 114, 542-560.
• 5. Dieterich M., Brandt T.: Ocular torsion and tilt of subjective visual vertical are sensitive brainstem signs, Ann. Neurol. 1993, 33(3), 292-299.
• 6. Iskander D.R. and Collins M.J.: Applications of high speed videokeratoscopy, Clin. Exp. Optom. 2005, 88(4), 223-231.
• 7. Kałużny B.J., Kałużny J.J., Szkulmowska A. et al.: Spectral optical coherence tomography: a new imaging technique in contact lens practice, Ophthal. Physiol. Opt. 2006, 26(2), 127-132.
• 8. Kasprzak H.T., Iskander D.R., Bajraszewski T., Kowalczyk A., Nowak-Szczepanowska W.: High accuracy measurement of spectral characteristics of movements of the eye elements, Óptica Pura y Aplicada 2007, 40(1), 7-11.
• 9. Kasprzak H., Iskander D.R.: Spectral characteristics of longitudinal corneal apex velocities and their relation to the cardiopulmonary system, Eye 2007, 21(9), 1212-1219.
• 10. Iskander D.R., Kasprzak H.T.: Dynamics in longitudinal eye movements and corneal shape, Ophthal. Physiol. Opt. 2006, 26(6), 572-579.
• 11. Zuckerman J.L., Taylor K.D., Grossman H.J.: Noncontact detection of ocular pulse-correlation with carotid stenosis, Invest. Ophthalmol. Vis. Sci. 1977, 16(11), 1018-1024.
• 12. Zuckerman J.L. and Grossman H.J.: Method of measuring ocular pulse, US Patent, 3,948,248, 1976.
• 13. Conover M.B.: Electrocardiography. Mosby's Pocket Guide Series, Mosty Inc., ST Louis, 2004.
• 14. Afonso V.X., Tompkins W.J., Nguyen T.Q., Michler K., and Shen L.: Comparing stress ECG enhancement algorithms, IEEE Eng. Medicine Biol. Mag. 1996, 15(3), 37-44.
• 15. Priestley M.B. Spectral analysis and time series, Academic Press, London 1994.
• 16. Eadie A.S., Pugh JR, Winn B.: The use of coherence functions in the study of ocular mechanism. Ophthal. Physiol. Opt. 1995; 15(4), 311-317.
• 17. Evans D.W., Hosking S.L., Embleton S.J., Morgan A.J., Barlett J.D.: Spectral content of the intraocular pressure pulse wave: glaucoma patients versus normal subjects. Graefe's Archives for Clinical and Experimental Ophtalmology, 2002, 240(6), 475-480.