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Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

The Journal of Latvian Academy of Sciences

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1407-009X
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Volume 71, Issue 5

Issues

Optimal Optotype Structure for Monitoring Visual Acuity

Galina Rozhkova
  • Corresponding author
  • Institute for Information Transmission Problems (Kharkevich Institute), Russian Academy of Sciences, Bolshoy Karetny per. 19, build.1, Moscow 127051, RUSSIAN FEDERATION
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Dmitry Lebedev
  • Institute for Information Transmission Problems (Kharkevich Institute), Russian Academy of Sciences, Bolshoy Karetny per. 19, build.1, Moscow 127051, RUSSIAN FEDERATION
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Maria Gracheva
  • Institute for Information Transmission Problems (Kharkevich Institute), Russian Academy of Sciences, Bolshoy Karetny per. 19, build.1, Moscow 127051, RUSSIAN FEDERATION
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Svetlana Rychkova
  • Institute for Information Transmission Problems (Kharkevich Institute), Russian Academy of Sciences, Bolshoy Karetny per. 19, build.1, Moscow 127051, RUSSIAN FEDERATION
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-11-14 | DOI: https://doi.org/10.1515/prolas-2017-0057

Abstract

To date, there are no generally accepted optotypes for monitoring visual acuity. All common optotypes are not completely suitable for some reasons. The tasks requiring visual monitoring - investigation of visual development, early diagnostics, assessment of treatment - impose heavy demands on the test stimuli. They must be: (1) suitable for patients of any age; (2) convenient for repeatable examinations; and (3) accurate enough for revealing the smallest physiologically significant changes of visual acuity. From theoretical consideration, one could conclude that the optotypes for monitoring visual acuity should be designed for measuring visual resolution but not recognition, unlike most popular optotypes. The best optotypes for visual resolution are gratinglike stimuli whose recognition could only be based on the high frequency part of the Fourier spectrum around the characteristic frequency (not on the low-frequency components). On the basis of theoretical analysis we elaborated modified 3-bar optotypes, which minimise the possibility of using low-frequency cues for stimulus recognition. In this paper we present the results of theoretical and experimental comparison of these optotypes with the two widely used ones: tumbling-E and standard 3-bar targets. According to the data obtained, our modified optotypes seem to be better than other investigated ones for monitoring visual acuity.

Keywords: visual acuity; resolution; recognition; tumbling-E; 3-bar target; low-frequency cues

References

  • Anderson, R. S., Thibos, L. N. (1999a). The relationship between acuity for gratings and for tumbling-E letters in peripheral vision. J. Opt. Soc. Amer. A, 16, 2321-2333.CrossrefGoogle Scholar

  • Anderson, R. S., Thibos, L. N. (1999b). Sampling limits and critical bandwidth for letter discrimination in peripheral vision. J. Opt. Soc. Amer. A, 16, 2334-2342.CrossrefGoogle Scholar

  • Bailey, I. L., Lovie, J. E. (1976). New design principles for visual acuity letter charts. Amer. J. Optom. Physiol. Opt., 53, 740-745.Google Scholar

  • Bennett, A. G. (1964). Ophthalmic test types. A review of previous work and discussions on some controversial questions. Brit. J. Physiol. Opt., 22 (4), 238-271.Google Scholar

  • Bondarko, V. M., Danilova, M. V. (1997). What spatial frequency do we use to detect the orientation of a Landolt C? Vis. Res., 37, 2153-2156.Google Scholar

  • Campbell, F. W., Green, D. G. (1965). Optical and retinal factors affecting visual resolution. J. Physiol., 181 (3), 576-593.Google Scholar

  • Colenbrander, A. (2008) The historical evolution of visual acuity measurement. Vis. Impair. Res., 10 (2-3), 57-66.Google Scholar

  • Green, J. (1868). On a new series of test-letters for determining the acuteness of vision. Trans. Amer. Ophthalmol. Soc., 1 (4-5), 68-71.Google Scholar

  • Heinrich, S. P., Bach, M. (2013). Resolution acuity versus recognition acuity with Landolt-style optotypes. Graefes Arch. Clin. Exp. Ophthalmol., 251 (9), 2235-2241.Google Scholar

  • Hyvarinen, L., Nasanen, R., Laurinen, P. (1980). New visual acuity tests for pre-school children. Acta Ophthalmol., 58 (4), 507-511.Google Scholar

  • ISO (1994). ISO 8596. International Standard. Ophthalmic optics. Visual acuity testing. Standard optotype and its presentation. Geneve. (2nd edition: Geneve, 2009).Google Scholar

  • ISO (1994). ISO 8597. International Standard. Optics and optical instruments. Visual acuity testing. Method of correlating optotypes. Geneve.Google Scholar

  • Koskin, S. A. (2009). The system of visual acuity measurements for medi¬cal expertise [Коскин, С. А. Система определения остроты зрения в целях врачебной экспертизы]. MD Thesis[ S.M. Kirov Military Medical Academy, St. Petersburg. 48 pp. (in Russian).Google Scholar

  • Landolt, E. (1889). Tableau d’optotypes pour la determination de l’acuite visuelle. Societe Francais.Google Scholar

  • Lebedev, D. S. (2015). A model of orientation recognition mechanisms for the 3-bar two-grade optotypes [Модель механизма распознавания ориентации 3-полосных двухградационных оптотипов]. Sensornye sistemy [Сенсорные системы], 29 (4), 309-320 (in Russian).Google Scholar

  • Lebedev, D. S., Belozerov, A. E., Rozhkova, G. I. (2010). The optotypes for an accurate assessment of visual acuity [Оптотипы для точной оценки остроты зрения]. Patent № 2447826; 07.12.10 (in Russian).Google Scholar

  • Pirenne, M. H. (1962). Visual acuity. The Eye, 2, 175-195.Google Scholar

  • Plainis, S., Tzatzala, P., Orphanos, Y., Tsilimbaris, M. K. (2007) A modified ETDRS visual acuity chart for European-wide use. Optom. Vis. Sci., 84 (7), 647-653.Google Scholar

  • Polat, U., Sagi, D. (1993). Lateral interactions between spatial channels: Suppression and facilitation revealed by lateral masking experiments. Vis. Res., 33 (7), 993-999.Google Scholar

  • Rozhkova, G. I. (2013). Visual acuity measurement: Account of the optotype structure. 36th European Conference on Visual Perception 2013. Bremen, Germany. 25-29 August. Perception, 42, Suppl., 69.Google Scholar

  • Rozhkova, G. I., Lebedev, D. S. (2010). Is it rational to use Landolt C and Snellen E as the optotypes in the modern-day visual acuity measurements for early diagnostics? In: Proceedings of the 1st World Congress on Controversies in Ophthalmology, Prague, Czech Republic, March 4-7, p. 16.Google Scholar

  • Rozhkova, G. I., Belozerov, A. E., Lebedev, D. S. (2012).Visual acuity measurement: uncertain effect of the low-frequency components of the optotype Fourier-spectra [Рожкова, Г. И., Белозеров, А. Е., Лебедев, Д. С. Измерение остроты зрения: неоднозначность влияния низко¬частотных составляющих спектра Фурье оптотипов]. Sensomye sistemy [Сенсорные системы], 26 (2), 160-171 (in Russian).Google Scholar

  • Rozhkova, G., Lebedev, D, Gracheva, M., Rychkova, S. (2014). Advantages of employing specially modified 3-bar stimuli for visual acuity monitoring in adults and children: Test-retest reliability. 37th European Conference on Visual Perception, Belgrad, Serbia, 24-28 August. Perception, 43, Suppl., 34.Google Scholar

  • Shelepin, Ju. E., Kolesnikova, L. N., Levkovich, Ju. I. (1985). Visio- contrastometry [Шелепин, Ю. E., Колесникова, Л. H., Левкович, Ю. И. Визоконтрастометрия.] Nauka, Leningrad. 103 pp. (in Russian).Google Scholar

  • Shelepin Ju. E., Glezer, V. D., Bondarko, V. M., Pavlovskaja, M. B., Vol, I. A., Danilov, Ju. P. (1992) Spatial Vision [Шелепин, Ю. E., Глезер, В. Д., Бондарко, В. М., Павловская, М. Б., Вол, И. А., Данилов, Ю. П. Пространственное зрение] In: Byzov, A. L. (Ed.). Vision Physiology [Физиология зрения. Под ред. А. Л. Бызова]. Nauka, Moscow, pp. 528-585. (in Russian)Google Scholar

  • Shelepin, Ju. E., Volkov, V. V., Makulov, V. B., Kolesnikova, L. N., Pauk, V. N. (1987). Measuring of functional possibilities of human visual system [Øåëåïèí, Þ. Å., Âîëêîâ, Â. Â., Ìàêóëîâ, Â. Á., Êîëåñíèêîâà, Ë. Í., Ïàóê, Â. Í. Èçìåðåíèå ôóíêöèîíàëüíûõ âîçìîæíîñòåé çðèòåëüíîé ñèñòåìû ÷åëîâåêà]. Academy of Sciences Herald, USSR [Âåñòíèê ÀÍ, ÑÑÑÐ], 9, 63-72 (in Russian).Google Scholar

  • Sloan, L. L. (1959). New test charts for the measurement of visual acuity at far and near distances. Amer. J. Ophthalmol., 48 (6), 807-813.Google Scholar

  • Snellen, H. (1862). Test-types for the Determination of the Acuteness of Vision. P. W. van de Weijer, Utrecht. 44 pp.Google Scholar

  • Stiers, P., Vanderkelen, R., Vandenbussche, E. (2003). Optotype and grating visual acuity in preschool children. Invest. Ophthalmol. Vis. Sci., 44, 4123-4130.CrossrefGoogle Scholar

  • Stiers, P., Vanderkelen, R., Vandenbussche, E. (2004). Optotype and grating visual acuity in patients with ocular and cerebral visual impairment. Invest. Ophthalmol. Vis. Sci., 45, 4333-4339.Google Scholar

  • USAF (1951). USAF-1951. United States Air Force 3-bar resolution test chart.Google Scholar

  • Wittich, W., Overbury, O., Kapusta, M. A., Watanabe, D. H. (2006). Differences between recognition and resolution acuity in patients undergoing macular hole surgery. Invest. Ophthalmol. Vis. Sci., 47, 3690-3694.Google Scholar

About the article

Received: 2016-11-08

Accepted: 2017-07-17

Published Online: 2017-11-14

Published in Print: 2017-10-26


Citation Information: Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences., Volume 71, Issue 5, Pages 327–338, ISSN (Online) 1407-009X, DOI: https://doi.org/10.1515/prolas-2017-0057.

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© by Galina Rozhkova. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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