Title of the article

SIMULATION OF EYE BIOMECHANICS IN PNEUMOTONOMETRIC TESTS USING METHOD OF SUPERPOSITION OF MOVEMENTS AND DEFORMATIONS OF A VISCOELASTIC BODY

Authors

CHIGAREV Anatoliy V., D. Sc. in Phys. and Math., Professor of the Department of Theoretical and Applied Mechanics, Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

MIKHNOVICH Maya O., Assistant of the Department “Intellectual and Mechatronic Systems”, Belarusian National Technical University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section MECHANICS OF DEFORMED SOLIDS
Year 2020 Issue 1 Pages 82–94
Type of article RAR Index UDK 629.03 Index BBK  
Abstract

Arbitrary points of the surface of the cornea due to deformation wavelike move almost from the center of the pupil along the radius of the eye, and the energy is distributed in the form of a wave with a rapidly damped amplitude. Studies reveal microvibration movements of the eye shell due to blood circulation in the microcirculation vessels of the eye. This makes it possible to allocate the maximum pressure in the systole phase and the minimum pressure in the diastole phase. The soft shell in the initial (unloaded) state does not have its own shape. Under the action of internal pressure, the soft shell takes the form corresponding to the largest volume. In this case, tensile stresses occur in the shell material, forming a self-balanced system together with the internal environment, in which the forming shell is stretched, and the internal environment (liquid, gel) is compressed. At any external influences and loadings, due to excessive pressure, only tensile stresses arise. Thus, the internal pressure gives the membrane the necessary structural rigidity.

Keywords

simulation, biomechanics, pneumotonometer, movement, deformation, viscoelasticity, model, cornea, impulse, membrane

  You can access full text version of the article.
Bibliography
  1. Gorshkov A.M. Biomekhanika glaz pri ikh vynuzhdennykh i sobstvennykh kolebaniyakh. Diss. kand. fiz.-mat. nauk [Biomechanics of the eye during their forced and natural vibrations. D. Sc. Thesis]. Saratov, 2008. 93 p.
  2. Gundorova R.A., Stepanov A.V., Kurbanova N.F. Sovremennaya oftalmotravmatologiya [Modern ophthalmic traumatology]. Moscow, Meditsina Publ., 2007. 256 p.
  3. Glaz [Eye]. Available at: http://ru.wikipedia.org/wiki/%D0%93% D0%BB%D0%B0%D0%B7 (accessed 10 June 2019).
  4. Dubrovskiy V.I., Fedorova V.N. Biomekhanika [Biomechanics]. Moscow, VLADOS-PRESS Publ., 2004. 672 p.
  5. Shamshinova A.M. Klinicheskaya fiziologiya zreniya: ocherki [Clinical physiology of vision: essays]. Moscow, T.M. Andreeva Publ., 2006. 956 p.
  6. Coscas G., Coscas F., Zourdani A. Kompleksnaya diagnostika patologii glaznogo dna [Comprehensive diagnostics of fundus pathology]. Moscow, Prakticheskaya meditsina Publ., 2007.
    496 p.
  7. Mekhanizmy akkomodatsii [Mechanisms of accommodation]. Available at: http://doktor-glaz.com/ (accessed 09 June 2019).
  8. Bauer S.M., Begun P.I., Lamminpiya A.M., Shelepin Yu.E. Ob energozatratakh glaza pri chtenii [About the energy consumption of the eye when reading]. Biomekhanika glaza 2009 [Eye biomechanics 2009], Moscow, 2009, pp. 3–6.
  9. Bauer S.M., Voronkova E.B., Tipyasev A.S. Otsenka vliyaniya formy rogovitsy i sklery na pokazateli vnutriglaznogo davleniya [Assessment of the influence of the shape of the cornea and sclera on intraocular pressure indicators]. Biomekhanika glaza 2009 [Eye biomechanics 2009], Moscow, 2009, pp. 94–97.
  10. Bauer S.M., Zimin B.A., Kolezhuk U.N., Kachanov A.B., Libimov G.A. O matematicheskom modelirovanii izmereniya vnutriglaznogo davleniya pritonometrii po metodu Maklakova [On the mathematical modeling of measuring intraocular pressure of pathometry by the Maklakov method]. Biomekhanika glaza 2005 [Eye biomechanics 2005], Moscow, 2005, pp. 121–122.
  11. Bauer S.M., Kachanov A.B., Semenov B.N., Slesoraytite E. O vliyanii tolshchiny rogovitsy na pokazateli vnutriglaznogo davleniya pri izmerenii VGD applanatsionnymi metodami [On the effect of corneal thickness on intraocular pressure indicators when measuring IOP by applanation methods]. Biomekhanika glaza 2007 [Eye biomechanics 2007], Moscow, 2007, pp. 119–124.
  12. Iomdina E.N., Poloz M.V. Biomekhanicheskaya model glaza cheloveka kak osnova dlya izucheniya ego akkomodatsionnoy sposobnosti [Biomechanical model of the human eye as a basis for studying its accommodation ability]. Rossiyskiy zhurnal biomekhaniki [Russian Journal of Biomechanics], 2010, vol. 14, no. 3(49), pp. 7–18.