The Journal of School and University Medicine

Revista De Medicina Scolara si Universitara

ISSN (Print): 2392-8344   ISSN (Online): 2392-8875   DOI: 10.51546/JSUM

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Pages: 22-29

Date of Publication: 28-Jan-2018

Practical concepts on the measurement of visual activity within the EUSCREEN, European project of early detection of vision and hearing impairment in children

Author: Prof. Dr. Cristina Vladutiu, Dr.Simona Sevan, Dr.Oana Teodosescu, Dr. Raluca-Maria Ursu

Category: Medical

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Abstract:

EUSCREEN is a 4-year European pilot project designed for implementation of early detection cost-effective programs for vision and hearing disorders in children from middle-income countries in Europe. In Romania, the project aims for the timely detection of amblyopia in children between the ages 4 and 6, in the Cluj County, by means of direct measurement of visual acuity, using age-appropriate methods and standardized tests. In our county visual screening will be performed by doctors and nurses in kindergartens, in urban area, and family doctor’s practices in rural area. For the targeted age group, „tumbling E__doublequotosing eye charts will be used, or the Lea symbols in the event of a poor cooperation. After performing visual acuity measurements, children whose visual acuity values stand below thresholds will be referred to the ophthalmologist for further diagnosis and treatment. The treatment of amblyopia is tailored to the age and level of vision of each patient and aims at achieving maximum visual acuity in both eyes; it comprises prescription of appropriate optical correction, improvement and preservation of the improved visual acuity of the amblyopic eye by occlusion or penalization of the sound eye, and, if required, the surgical treatment in selected cases. In order to acquire accurate results, it is important for the medical staff involved to be trained the correct visual acuity measurement technique and to rigorously apply the method.

Keywords: amblyopia, vision screening, visual acuity, preschool children, visual disorders

References:

Oscar A, Cherninkova S, Haykin V, et al. Amblyopia screening in Bulgaria. J Pediatr Ophthalmol Strabismus. 2014 Sep-Oct;51(5):284-8.

2. Levi DM. Visual processing in amblyopia: human studies. Strabismus. 2006 Mar;14(1):11-9.

3. Engin O, et al. Comparison of optotypes of Amsterdam Picture Chart with those of Tumbling-E, LEA symbols, ETDRS, and Landolt-C in non-amblyopic and amblyopic patients. Graefes Arch Clin Exp Ophthalmol. 2014 Dec;252(12):2013-20.

4. International Council of Ophthalmology, Visual Acuity Measurement Standard (1984). Italian J Opht, II/I, p1, 1988.

5. Reich, L.N., and Ekabutr, M., The Effects of Optical Defocus on the Legibility of the Tumbling-E and Landolt-C. Optom Vis Sci 79(6), 389, 2002.

6. Hered, R.W., Murphy, S., and Clancy, M., Comparison of the HOTV and Lea Symbols charts for preschool vision screening. J Pediatr Opht Strab 34(1):24, 1997.

7. Taylor, H.R., Applying New Design Principles to the Construction of an Illiterate E Chart. Am J Optom & Physiol Optics 55:348, 1978.

8. C. Vl?du?iu, Strabismul -Ghid practic. Ed. Napoca Star, Cluj-Napoca, 1999;23: 49.

9. European Standard: Ophthalmic options - Visual acuity testing - Standard optotype and its presentation ISO 8596: 2009. Approved by CEN on 27 June 2009.

10. Sheedy JE, Bailey IL, Raasch TW. Visual acuity and chart luminance. Am J Optom Physiol Opt. 1984; 61: 595-600.

11. Kashinatha S.M., Gopalakrishna K., Preetha. Visual Development and Visual Acuity Testing In Children. RJPBCS 2013 Oct-Dec.: 694

12. https://en.wiktionary.org/wiki/optotype

13. https://www.opt.uh.edu/onlineCourseMaterials/NewCourseFiles/OPTO7361/7-ADDITIONAL%20INFORMATION/0seguStandardized%20Procedures%20for%20the%20Measurements%20of%20Visual%20Acuity%20and%20Visual%20Acuity%20Charts.pdf

14. Whitney D, Levi D.M. Visual Crowding: a fundamental limit on conscious perception and object recognition. Trends Cogn Sci. 2011 Apr; 15(4): 160–168.

15. Huurneman B., Boonstra F.N., Cox R.F.A, Cillessen A.H.N., van Rens G. A systematic review on ‘Foveal Crowding’ in visually impaired children and perceptual learning as a method to reduce Crowding. BMC Ophthalmology. 2012 July; 12:27

16. Levi DM, Klein SA. Vernier acuity, crowding and amblyopia. Vision Res 1985; 25: 979–991.

17. Hartmann, E.E., Dobson, V., Hainline L., Marsh-Tootle, W., Quinn, G.E., Ruttum, M.S., Schmidt, P.P., and Simons, K. (2000). Preschool vision screening: Summary of a Task Force report on behalf of the Maternal and Child Health Bureau and the National Eye Institute Task Force on Vision Screening in the Preschool Child. Pediatrics, 106(5), 1105-1116.

18. https://www.precision-vision.com/snellen-eye-test-charts-interpretation/ accesat la data de 11 ianuarie 2018

19. Cernea P. Tratat de oftalmologie. Ed. Medicala. Bucuresti 2002; p.109

20. Anstice NS, Thompson B. The measurement of visual acuity in children: an evidence-based update. Clin Exp Optom 2014; 97:3-11.

21. Bailey IL, Lovie JE. I (1976.) New design principles for visual acuity letter charts. Am J Optom Physiol Opt. 53 (11): pp. 740–745.

22.Grosvenor, Theodore (2007). Primary care Optometry. St. Louis, Missouri: ELSEVIER. pp. 174–175. ISBN 9780750675758.

23."First Research starts in 1974". National Vision Research Institute. Retrieved 2015-09-24.

24.Carlson, Kurts, Nancy, Daniel (2004). Clinical Procedures of Ocular Examination. U.S.A: McGraw HIll. p. 10. ISBN 0-07-137078-1.

25.Virgili G, Acosta R, Grover LL, Bentley SA, Giacomelli G (2013). "Reading aids for adults with low vision". Cochrane Database Syst Rev. 10: CD003303. doi:10.1002/14651858.CD003303.pub3. PMID 24154864.

26. http://www.precision-vision.com/a-visual-acuity/#Linear_scales /acccesat la data de 14 ianuarie 2018