Results of a study on the stress-strain behavior of the cornea in polarized light under conditions of visual work
Background: Near visual work causes redistribution of internal stresses in the cornea, leading to a change in the shape and parameters of the interference patterns observed on the cornea in polarized light. Purpose: To assess the effect of various types of visual load on the extraocular muscles (...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Ukrainian Society of Ophthalmologists
2021-08-01
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| Series: | Journal of Ophthalmology |
| Subjects: | |
| Online Access: | https://www.ozhurnal.com/en/archive/2021/4/11-fulltext |
| _version_ | 1797398185983868928 |
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| author | M. L. Kochina I. V. Kaplin N. M Kovtun N. M. Maslova O. V. Yavorsky |
| author_facet | M. L. Kochina I. V. Kaplin N. M Kovtun N. M. Maslova O. V. Yavorsky |
| author_sort | M. L. Kochina |
| collection | DOAJ |
| description | Background: Near visual work causes redistribution of internal stresses in the cornea, leading to a change in the shape and parameters of the interference patterns observed on the cornea in polarized light.
Purpose: To assess the effect of various types of visual load on the extraocular muscles (EOM) in children and adolescents on the basis of characteristics of the interference patterns observed on the cornea in polarized light.
Material and Methods: The interference patterns observed on the cornea in polarized light were studied in children and adolescents before and after they performed a visual load task which consisted in either working with texts printed on paper at different parameters of convenience for reading (97 individuals) or playing Tetris on a smartphone (58 adolescents). A symmetry coefficient K was calculated for the quantitative assessment of changes in interference pattern parameters induced by visual load.
Results: Performing a visual load task which consisted in working with texts printed on paper resulted in a significant increase in asymmetry between the actions of the EOM in 60% to 73% of children; this was indicated by the values of a symmetry coefficient K which were twofold to six-fold higher than normal. Performing a visual load task which consisted in playing Tetris on a smartphone resulted in an increase in asymmetry between the actions of the EOM in 64% of adolescents.
Conclusion: Our research confirmed that studies on the stress-strain behavior of the cornea in polarized light are promising for assessing the effect of various types of visual load on the function of EOM. |
| first_indexed | 2024-03-09T01:22:07Z |
| format | Article |
| id | doaj.art-09b8d5343e1445468c6c95de1744b29d |
| institution | Directory Open Access Journal |
| issn | 2412-8740 |
| language | English |
| last_indexed | 2024-03-09T01:22:07Z |
| publishDate | 2021-08-01 |
| publisher | Ukrainian Society of Ophthalmologists |
| record_format | Article |
| series | Journal of Ophthalmology |
| spelling | doaj.art-09b8d5343e1445468c6c95de1744b29d2023-12-10T11:57:30ZengUkrainian Society of OphthalmologistsJournal of Ophthalmology2412-87402021-08-014616610.31288/oftalmolzh202146166Results of a study on the stress-strain behavior of the cornea in polarized light under conditions of visual workM. L. Kochina0I. V. Kaplin1N. M Kovtun2N. M. Maslova 3O. V. Yavorsky4Petro Mohyla Black Sea National UniversityKyiv Center for Eye Therapy and MicrosurgeryOftalmika, International Medical CenterKharkiv National Medical UniversityKharkiv National Medical UniversityBackground: Near visual work causes redistribution of internal stresses in the cornea, leading to a change in the shape and parameters of the interference patterns observed on the cornea in polarized light. Purpose: To assess the effect of various types of visual load on the extraocular muscles (EOM) in children and adolescents on the basis of characteristics of the interference patterns observed on the cornea in polarized light. Material and Methods: The interference patterns observed on the cornea in polarized light were studied in children and adolescents before and after they performed a visual load task which consisted in either working with texts printed on paper at different parameters of convenience for reading (97 individuals) or playing Tetris on a smartphone (58 adolescents). A symmetry coefficient K was calculated for the quantitative assessment of changes in interference pattern parameters induced by visual load. Results: Performing a visual load task which consisted in working with texts printed on paper resulted in a significant increase in asymmetry between the actions of the EOM in 60% to 73% of children; this was indicated by the values of a symmetry coefficient K which were twofold to six-fold higher than normal. Performing a visual load task which consisted in playing Tetris on a smartphone resulted in an increase in asymmetry between the actions of the EOM in 64% of adolescents. Conclusion: Our research confirmed that studies on the stress-strain behavior of the cornea in polarized light are promising for assessing the effect of various types of visual load on the function of EOM.https://www.ozhurnal.com/en/archive/2021/4/11-fulltextextraocular musclespolarized lightstress-strain behavior of the corneainterference patternssymmetry coefficient |
| spellingShingle | M. L. Kochina I. V. Kaplin N. M Kovtun N. M. Maslova O. V. Yavorsky Results of a study on the stress-strain behavior of the cornea in polarized light under conditions of visual work Journal of Ophthalmology extraocular muscles polarized light stress-strain behavior of the cornea interference patterns symmetry coefficient |
| title | Results of a study on the stress-strain behavior of the cornea in polarized light under conditions of visual work |
| title_full | Results of a study on the stress-strain behavior of the cornea in polarized light under conditions of visual work |
| title_fullStr | Results of a study on the stress-strain behavior of the cornea in polarized light under conditions of visual work |
| title_full_unstemmed | Results of a study on the stress-strain behavior of the cornea in polarized light under conditions of visual work |
| title_short | Results of a study on the stress-strain behavior of the cornea in polarized light under conditions of visual work |
| title_sort | results of a study on the stress strain behavior of the cornea in polarized light under conditions of visual work |
| topic | extraocular muscles polarized light stress-strain behavior of the cornea interference patterns symmetry coefficient |
| url | https://www.ozhurnal.com/en/archive/2021/4/11-fulltext |
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