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Association between astigmatism and amblyopia.

  • Sapkota, Kishor (University of Minho, Centre of physics, Braga, Portugal Nepal Eye Hospital) ;
  • Kim, Douk Hoon (Department of Optometry, Masan University)
  • 투고 : 2022.03.10
  • 심사 : 2022.03.29
  • 발행 : 2022.06.30

초록

Purpose: The aim of this study was to determine the association between stigmatism and amblyopia. Methods: It was a hospital based, cross-sectional retrospective study conducted in Nepal Eye Hospital. Medical record of amblyopic children aged 13 years or younger from were reviewed. Children with amblyopic eyes due to simple astigmatism were included. Relation between depth of amblyopia with magnitude and types of astigmatism, orientation of axis was determined. Out of 139 amblyopic eyes of 82 children, 93 were simple myopic astigmatism and remaining 42 were simple hyperopic astigmatism. Results: Mean age of patients was 7.38±2.61 years. Visual acuity improved by at least one line in Snellen chart in 4/5th of eyes after astigmatic correction. Moderate amblyopia was found to be present in 45% eyes while severe amblyopia in 16% of eyes. With the rule astigmatism was found to be present in 88% eyes. Mean astigmatism was 2.47±0.98D and majority of eyes (67.7%) had high astigmatism. Depth of amblyopia was not associated with magnitude of astigmatism (p > 0.05) but number of lines improved with astigmatic correction was correlated with the magnitude of astigmatism (p < 0.001). Risk of amblyopia is more in high myopic astigmatism. Conclusion: Presenting age of amblyopic children was late in Nepal. Depth of amblyopia was not associated with magnitude of astigmatism.

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참고문헌

  1. von Noorden GK, Campos EC, editors. Binocular vision and ocular motility: theory and management of strabismus. 6th ed. St. Louis: Mosby; 2001. pp. 246-247.
  2. Karki KJ. Prevalence of amblyopia in ametropias in a clinical set-up. Kathmandu Univ Med J (KUMJ) 2006;4:470-3.
  3. Weakley DR Jr. The association between nonstrabismic anisometropia, amblyopia, and subnormal binocularity. Ophthalmology. 2001 Jan;108(1):163-71. https://doi.org/10.1016/S0161-6420(00)00425-5
  4. Xiao X, Liu WM, Zhao WX, Wang Y, Zhang YJ. [Prevalence of astigmatism in 2023 children with amblyopia]. Zhongguo Dang Dai Er Ke Za Zhi 2011;13:462-5.
  5. Dobson V, Miller JM, Harvey EM, Mohan KM. Amblyopia in astigmatic preschool children. Vision Res. 2003 Apr;43(9):1081-90. https://doi.org/10.1016/S0042-6989(03)00014-2
  6. Donahue SP, Arnold RW, Ruben JB, for the AAPOS Vision Screening Committee. Preschool vision screening: What should we be detecting and how should we report it? Uniform guidelines for reporting results of preschool vision screening studies. J AAPOS 2003;7:314-16. https://doi.org/10.1016/S1091-8531(03)00182-4
  7. Singh I, Sachdev N, Brar GS, Kaushik S. Part-time occlusion therapy for amblyopia in older children. Indian J Ophthalmol 2008;56:459-463. https://doi.org/10.4103/0301-4738.43365
  8. Pokharel A, Pokharel PK, Das H, Adhikari S. The patterns of refractive errors among the school children of rural and urban settings in Nepal. Nep J Oph 2010;2(4):114-120. https://doi.org/10.3126/nepjoph.v2i2.3717
  9. Woodruff G, Hiscox F, Thompson JR, Smith LK. The presentation of children with amblyopia. Eye (Lond). 1994;8 ( Pt 6):623-6. https://doi.org/10.1038/eye.1994.156
  10. Harvey EM, Dobson V, Miller JM, Donaldson CE. Changes in Visual Function Following Optical Treatment of Astigmatism-Related Amblyopia. Vision Res. 2008; 48(6):773-87. https://doi.org/10.1016/j.visres.2007.12.007
  11. Dobson V, Fulton AB, Sebris SL. Cycloplegic refractions of infants and young children: the axis of astigmatism. Invest Ophthalmol Vis Sci. 1984 Jan;25(1):83-7.
  12. Crowen L, Bobier WR. The pattern of astigmatism in a Canadian preschool population. Invest Ophthalmol Vis Sci. 2003 Oct;44(10):4593-600. https://doi.org/10.1167/iovs.02-0730
  13. Abrahamsson M, Sjostrand J. Astigmatic axis and amblyopia in childhood. Acta Ophthalmol Scand. 2003 Feb;81(1):33-7. https://doi.org/10.1034/j.1600-0420.2003.00022.x