Main Article Content
Abstract
Vision is essential for both humans and animals to perceive their surroundings. However, various factors can affect the anatomical structure of the eye, leading to vision-related disorders. One such condition is myopia, which results from the elongation of the eyeball. This elongation typically occurs when the eyes are deprived of adequate direct light over an extended period. Myopia affects both humans and animals, altering their ability to focus on distant objects. This study aims to investigate the anatomical changes associated with myopia, identify its underlying causes, and propose guidelines for its prevention and treatment. Special attention is given to individuals and animals exposed to prolonged periods of insufficient light, as they are at a higher risk of developing this condition.
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References
- Assadnassab, G., & Fartashvand, M. (2013). Ultrasonographic evaluation of buffalo eyes. Turkish Journal of Veterinary & Animal Sciences, 37(4), 395-398. https://doi.org/10.3906/vet-1207-5
- Baird, P. N., Saw, S. M., Lanca, C., Guggenheim, J. A., Smith III, E. L., Zhou, X., Matsui, K. O., Wu, P. C., Sankaridurg, P., Chia, A., & Rosman, M. (2020). Myopia. Nature Reviews Disease Primers, 6(1), 99. https://doi.org/10.1038/s41572-020-00231-4
- Brainard, G. C., & Morgan, W. W. (1987). Light-induced stimulation of retinal dopamine: A dose-response relationship. Brain Research, 424(1), 199-203. https://doi.org/10.1016/0006-8993(87)90878-2
- Bueno, J. M., Lo Sapio, M., Sanes, J. M., & Seva, J. (2017). Analysis of the ocular refractive state in fighting bulls: Astigmatism prevalence. BioMed Research International, 2017, Article 820910. https://doi.org/10.1155/2017/820910
- Bullimore, M. A., & Brennan, N. A. (2019). Myopia control: Why each diopter matters. Optometry and Vision Science, 96(6), 463-465. https://doi.org/10.1097/OPX.0000000000001367
- Chen, D. Z., Koh, V., Tan, M., Tan, C. S., Nah, G., Shen, L., Bhargava, M., Cheng, C. Y., Zhao, P., Wong, T. Y., & Saw, S. M. (2018). Peripheral retinal changes in highly myopic young Asian eyes. Acta Ophthalmologica, 96(7), e846-51. https://doi.org/10.1111/aos.13963
- Cooper, J., & Tkatchenko, A. V. (2018). A review of current concepts of the etiology and treatment of myopia. Eye & Contact Lens, 44(4), 231. https://doi.org/10.1097/ICL.0000000000000470
- Dong, J., Wu, Q., & Wang, X. G. (2013). Measurement of central corneal thickness and pre-corneal tear film thickness of rabbits using the Scheimpflug system. International Journal of Ophthalmology, 6(5), 584. https://doi.org/10.3980/j.issn.2222-3959.2013.05.06
- Edwards, M. H. (1996). Animal models of myopia: A review. Acta Ophthalmologica Scandinavica, 74(3), 213-219. https://doi.org/10.1111/j.1600-0420.1996.tb00062.x
- George, A. S., George, A. H., & Shahul, A. (2023). The myopia epidemic: A growing public health crisis impacting children worldwide. Partners Universal International Research Journal, 2(3), 120-138. https://doi.org/10.5281/zenodo.8361064
- Goss, D. A. (2000). Nearwork and myopia. The Lancet, 356(9240), 1456-1457. https://doi.org/10.1016/S0140-6736(00)02866-5
- Gupta, S., Joshi, A., Saxena, H., & Chatterjee, A. (2021). Outdoor activity and myopia progression in children: A follow-up study using mixed-effects model. Indian Journal of Ophthalmology, 69(12), 3446. https://doi.org/10.4103/ijo.IJO_1039_21
- Hernandez, J., Moore, C., Si, X., Richer, S., Jackson, J., & Wang, W. (2016). Aging dogs manifest myopia as measured by autorefractor. PLoS ONE, 11(2), e0148436. https://doi.org/10.1371/journal.pone.0148436
- Huang, H. M., Chang, D. S., & Wu, P. C. (2015). The association between near work activities and myopia in children—a systematic review and meta-analysis. PloS One, 10(10), e0140419. https://doi.org/10.1371/journal.pone.0140419
- Ip, J. M., Saw, S. M., Rose, K. A., Morgan, I. G., Kifley, A., Wang, J. J., & Mitchell, P. (2008). Role of near work in myopia: Findings in a sample of Australian school children. Investigative Ophthalmology & Visual Science, 49(7), 2903-2910. https://doi.org/10.1167/iovs.07-1340
- Jonas, J. B., Wang, Y. X., Dong, L., Guo, Y., & Panda-Jonas, S. (2020). Advances in myopia research: Anatomical findings in highly myopic eyes. Eye and Vision, 7(1), 1. https://doi.org/10.1186/s40662-020-00186-5
- Keller, T. (2022). Education on Boyer 4th Newsletter-October 2022. https://mosaic.messiah.edu/edu_st/20
- Lanca, C., Kassam, I., Patasova, K., Foo, L. L., Li, J., Ang, M., Hoang, Q. V., Teo, Y. Y., Hysi, P. G., & Saw, S. M. (2021). New polygenic risk score to predict high myopia in Singapore Chinese children. Translational Vision Science & Technology, 10(8), 26. https://doi.org/10.1167/tvst.10.8.26
- Lee, W. B., Jacobs, D. S., Musch, D. C., Kaufman, S. C., Reinhart, W. J., & Shtein, R. M. (2009). Descemet's stripping endothelial keratoplasty: Safety and outcomes: A report by the American Academy of Ophthalmology. Ophthalmology, 116(9), 1818-1830. https://doi.org/10.1016/j.ophtha.2009.05.021
- Leslie, S. R., Fields, A. P., & Cohen, A. E. (2010). Convex lens-induced confinement for imaging single molecules. Analytical Chemistry, 82(14), 6224-6229. https://doi.org/10.1021/ac101072y
- Luong, T. Q., Shu, Y. H., Modjtahedi, B. S., Fong, D. S., Choudry, N., Tanaka, Y., & Nau, C. L. (2020). Racial and ethnic differences in myopia progression in a large, diverse cohort of pediatric patients. Investigative Ophthalmology & Visual Science, 61(13), 20. https://doi.org/10.1167/iovs.61.13.20
- Mass, A. M., & Supin, A. Y. (2007). Adaptive features of aquatic mammals' eye. The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology, 290(6), 701-715. https://doi.org/10.1002/ar.20592
- McBrien, N. A., Moghaddam, H. O., New, R., & Williams, L. R. (1993). Experimental myopia in a diurnal mammal (Sciurus carolinensis) with no accommodative ability. The Journal of Physiology, 469(1), 427-441. https://doi.org/10.1113/jphysiol.1993.sp019166
- Morgan, I. G., & Jan, C. L. (2022). China turns to school reform to control the myopia epidemic: A narrative review. Asia-Pacific Journal of Ophthalmology, 11(1), 27-35. https://doi.org/10.1097/APO.0000000000000240
- Morgan, I. G., Ohno-Matsui, K., & Saw, S. M. (2012). Myopia. The Lancet, 379(9827), 1739-1748. https://doi.org/10.1016/S0140-6736(12)60272-4
- Mu, J., Zhong, H., Liu, M., Jiang, M., Shuai, X., Chen, Y., Long, W., & Zhang, S. (2022). Trends in myopia development among primary and secondary school students during the COVID-19 pandemic: A large-scale cross-sectional study. Frontiers in Public Health, 10, 859285. https://doi.org/10.3389/fpubh.2022.859285
- Murphy, C. J., Zadnik, K., & Mannis, M. J. (1992). Myopia and refractive error in dogs. Investigative Ophthalmology & Visual Science, 33(8), 2459-2463. https://doi.org/10.1167/iovs.33.8.2459
- Norton, T. T. (1999). Animal models of myopia: Learning how vision controls the size of the eye. ILAR Journal, 40(2), 59-77. https://doi.org/10.1093/ilar.40.2.59
- Ohno-Matsui, K. (2017). What is the fundamental nature of pathologic myopia? Retina, 37(6), 1043-1048. https://doi.org/10.1097/IAE.0000000000001407
- Pan, C. W., Dirani, M., Cheng, C. Y., Wong, T. Y., & Saw, S. M. (2015). The age-specific prevalence of myopia in Asia: A meta-analysis. Optometry and Vision Science, 92(3), 258-266. https://doi.org/10.1097/OPX.0000000000000490
- Priscilla, J. J., & Verkicharla, P. K. (2021). Time trends on the prevalence of myopia in India–A prediction model for 2050. Ophthalmic and Physiological Optics, 41(3), 466-474. https://doi.org/10.1111/opo.12806
- Rammo, R. A., Ozinga, S. J., White, A., Nagel, S. J., Machado, A. G., Pallavaram, S., Cheeran, B. J., & Walter, B. L. (2022). Directional stimulation in Parkinson's disease and essential tremor: The Cleveland Clinic experience. Neuromodulation: Technology at the Neural Interface, 25(6), 829-835. https://doi.org/10.1111/ner.13641
- Reichard, M., Hovakimyan, M., Wree, A., Meyer-Lindenberg, A., Nolte, I., Junghans, C., Guthoff, R., & Stachs, O. (2010). Comparative in vivo confocal microscopical study of the cornea anatomy of different laboratory animals. Current Eye Research, 35(12), 1072-1080. https://doi.org/10.3109/02713683.2010.507839
- Saw, S. M., Katz, J., Schein, O. D., Chew, S. J., & Chan, T. K. (1996). Epidemiology of myopia. Epidemiologic Reviews, 18(2), 175-187. https://doi.org/10.1093/oxfordjournals.epirev.a017924
- Saw, S. M., Matsumura, S., & Hoang, Q. V. (2019). Prevention and management of myopia and myopic pathology. Investigative Ophthalmology & Visual Science, 60(2), 488-99. https://doi.org/10.1167/iovs.60.2.488
- Smith III, E. L., & Hung, L. F. (2000). Form-deprivation myopia in monkeys is a graded phenomenon. Vision Research, 40(4), 371-381. https://doi.org/10.1016/S0042-6989(99)00175-3
- Tang, W. C., Yap, M. K., & Yip, S. P. (2008). A review of current approaches to identifying human genes involved in myopia. Clinical and Experimental Optometry, 91(1), 4-22. https://doi.org/10.1111/j.1444-0938.2007.00280.x
- Tsai, D. C., Fang, S. Y., Huang, N., Hsu, C. C., Chen, S. Y., Chiu, A. W., & Liu, C. J. (2016). Myopia development among young schoolchildren: The myopia investigation study in Taipei. Investigative Ophthalmology & Visual Science, 57(15), 6852-6860. https://doi.org/10.1167/iovs.16-19933
- Whitmore, W. G., Curtin, B. J., & Fox, D. (1993). The modulation of ocular growth in rabbits with peripheral retinal ablation. Ophthalmology, 100(7), 1003-1008. https://doi.org/10.1016/S0161-6420(93)31280-3
- Wisely, C. E., Sayed, J. A., Tamez, H., Zelinka, C., Abdel-Rahman, M. H., Fischer, A. J., & Cebulla, C. M. (2017). The chick eye in vision research: An excellent model for the study of ocular disease. Progress in Retinal and Eye Research, 61, 72-97. https://doi.org/10.1016/j.preteyeres.2017.06.002
- Zhu, J., Zhang, E., & Del Rio-Tsonis, K. (2012). Eye anatomy. eLS. https://doi.org/10.1002/9780470015902.a0000747.pub3
References
Assadnassab, G., & Fartashvand, M. (2013). Ultrasonographic evaluation of buffalo eyes. Turkish Journal of Veterinary & Animal Sciences, 37(4), 395-398. https://doi.org/10.3906/vet-1207-5
Baird, P. N., Saw, S. M., Lanca, C., Guggenheim, J. A., Smith III, E. L., Zhou, X., Matsui, K. O., Wu, P. C., Sankaridurg, P., Chia, A., & Rosman, M. (2020). Myopia. Nature Reviews Disease Primers, 6(1), 99. https://doi.org/10.1038/s41572-020-00231-4
Brainard, G. C., & Morgan, W. W. (1987). Light-induced stimulation of retinal dopamine: A dose-response relationship. Brain Research, 424(1), 199-203. https://doi.org/10.1016/0006-8993(87)90878-2
Bueno, J. M., Lo Sapio, M., Sanes, J. M., & Seva, J. (2017). Analysis of the ocular refractive state in fighting bulls: Astigmatism prevalence. BioMed Research International, 2017, Article 820910. https://doi.org/10.1155/2017/820910
Bullimore, M. A., & Brennan, N. A. (2019). Myopia control: Why each diopter matters. Optometry and Vision Science, 96(6), 463-465. https://doi.org/10.1097/OPX.0000000000001367
Chen, D. Z., Koh, V., Tan, M., Tan, C. S., Nah, G., Shen, L., Bhargava, M., Cheng, C. Y., Zhao, P., Wong, T. Y., & Saw, S. M. (2018). Peripheral retinal changes in highly myopic young Asian eyes. Acta Ophthalmologica, 96(7), e846-51. https://doi.org/10.1111/aos.13963
Cooper, J., & Tkatchenko, A. V. (2018). A review of current concepts of the etiology and treatment of myopia. Eye & Contact Lens, 44(4), 231. https://doi.org/10.1097/ICL.0000000000000470
Dong, J., Wu, Q., & Wang, X. G. (2013). Measurement of central corneal thickness and pre-corneal tear film thickness of rabbits using the Scheimpflug system. International Journal of Ophthalmology, 6(5), 584. https://doi.org/10.3980/j.issn.2222-3959.2013.05.06
Edwards, M. H. (1996). Animal models of myopia: A review. Acta Ophthalmologica Scandinavica, 74(3), 213-219. https://doi.org/10.1111/j.1600-0420.1996.tb00062.x
George, A. S., George, A. H., & Shahul, A. (2023). The myopia epidemic: A growing public health crisis impacting children worldwide. Partners Universal International Research Journal, 2(3), 120-138. https://doi.org/10.5281/zenodo.8361064
Goss, D. A. (2000). Nearwork and myopia. The Lancet, 356(9240), 1456-1457. https://doi.org/10.1016/S0140-6736(00)02866-5
Gupta, S., Joshi, A., Saxena, H., & Chatterjee, A. (2021). Outdoor activity and myopia progression in children: A follow-up study using mixed-effects model. Indian Journal of Ophthalmology, 69(12), 3446. https://doi.org/10.4103/ijo.IJO_1039_21
Hernandez, J., Moore, C., Si, X., Richer, S., Jackson, J., & Wang, W. (2016). Aging dogs manifest myopia as measured by autorefractor. PLoS ONE, 11(2), e0148436. https://doi.org/10.1371/journal.pone.0148436
Huang, H. M., Chang, D. S., & Wu, P. C. (2015). The association between near work activities and myopia in children—a systematic review and meta-analysis. PloS One, 10(10), e0140419. https://doi.org/10.1371/journal.pone.0140419
Ip, J. M., Saw, S. M., Rose, K. A., Morgan, I. G., Kifley, A., Wang, J. J., & Mitchell, P. (2008). Role of near work in myopia: Findings in a sample of Australian school children. Investigative Ophthalmology & Visual Science, 49(7), 2903-2910. https://doi.org/10.1167/iovs.07-1340
Jonas, J. B., Wang, Y. X., Dong, L., Guo, Y., & Panda-Jonas, S. (2020). Advances in myopia research: Anatomical findings in highly myopic eyes. Eye and Vision, 7(1), 1. https://doi.org/10.1186/s40662-020-00186-5
Keller, T. (2022). Education on Boyer 4th Newsletter-October 2022. https://mosaic.messiah.edu/edu_st/20
Lanca, C., Kassam, I., Patasova, K., Foo, L. L., Li, J., Ang, M., Hoang, Q. V., Teo, Y. Y., Hysi, P. G., & Saw, S. M. (2021). New polygenic risk score to predict high myopia in Singapore Chinese children. Translational Vision Science & Technology, 10(8), 26. https://doi.org/10.1167/tvst.10.8.26
Lee, W. B., Jacobs, D. S., Musch, D. C., Kaufman, S. C., Reinhart, W. J., & Shtein, R. M. (2009). Descemet's stripping endothelial keratoplasty: Safety and outcomes: A report by the American Academy of Ophthalmology. Ophthalmology, 116(9), 1818-1830. https://doi.org/10.1016/j.ophtha.2009.05.021
Leslie, S. R., Fields, A. P., & Cohen, A. E. (2010). Convex lens-induced confinement for imaging single molecules. Analytical Chemistry, 82(14), 6224-6229. https://doi.org/10.1021/ac101072y
Luong, T. Q., Shu, Y. H., Modjtahedi, B. S., Fong, D. S., Choudry, N., Tanaka, Y., & Nau, C. L. (2020). Racial and ethnic differences in myopia progression in a large, diverse cohort of pediatric patients. Investigative Ophthalmology & Visual Science, 61(13), 20. https://doi.org/10.1167/iovs.61.13.20
Mass, A. M., & Supin, A. Y. (2007). Adaptive features of aquatic mammals' eye. The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology, 290(6), 701-715. https://doi.org/10.1002/ar.20592
McBrien, N. A., Moghaddam, H. O., New, R., & Williams, L. R. (1993). Experimental myopia in a diurnal mammal (Sciurus carolinensis) with no accommodative ability. The Journal of Physiology, 469(1), 427-441. https://doi.org/10.1113/jphysiol.1993.sp019166
Morgan, I. G., & Jan, C. L. (2022). China turns to school reform to control the myopia epidemic: A narrative review. Asia-Pacific Journal of Ophthalmology, 11(1), 27-35. https://doi.org/10.1097/APO.0000000000000240
Morgan, I. G., Ohno-Matsui, K., & Saw, S. M. (2012). Myopia. The Lancet, 379(9827), 1739-1748. https://doi.org/10.1016/S0140-6736(12)60272-4
Mu, J., Zhong, H., Liu, M., Jiang, M., Shuai, X., Chen, Y., Long, W., & Zhang, S. (2022). Trends in myopia development among primary and secondary school students during the COVID-19 pandemic: A large-scale cross-sectional study. Frontiers in Public Health, 10, 859285. https://doi.org/10.3389/fpubh.2022.859285
Murphy, C. J., Zadnik, K., & Mannis, M. J. (1992). Myopia and refractive error in dogs. Investigative Ophthalmology & Visual Science, 33(8), 2459-2463. https://doi.org/10.1167/iovs.33.8.2459
Norton, T. T. (1999). Animal models of myopia: Learning how vision controls the size of the eye. ILAR Journal, 40(2), 59-77. https://doi.org/10.1093/ilar.40.2.59
Ohno-Matsui, K. (2017). What is the fundamental nature of pathologic myopia? Retina, 37(6), 1043-1048. https://doi.org/10.1097/IAE.0000000000001407
Pan, C. W., Dirani, M., Cheng, C. Y., Wong, T. Y., & Saw, S. M. (2015). The age-specific prevalence of myopia in Asia: A meta-analysis. Optometry and Vision Science, 92(3), 258-266. https://doi.org/10.1097/OPX.0000000000000490
Priscilla, J. J., & Verkicharla, P. K. (2021). Time trends on the prevalence of myopia in India–A prediction model for 2050. Ophthalmic and Physiological Optics, 41(3), 466-474. https://doi.org/10.1111/opo.12806
Rammo, R. A., Ozinga, S. J., White, A., Nagel, S. J., Machado, A. G., Pallavaram, S., Cheeran, B. J., & Walter, B. L. (2022). Directional stimulation in Parkinson's disease and essential tremor: The Cleveland Clinic experience. Neuromodulation: Technology at the Neural Interface, 25(6), 829-835. https://doi.org/10.1111/ner.13641
Reichard, M., Hovakimyan, M., Wree, A., Meyer-Lindenberg, A., Nolte, I., Junghans, C., Guthoff, R., & Stachs, O. (2010). Comparative in vivo confocal microscopical study of the cornea anatomy of different laboratory animals. Current Eye Research, 35(12), 1072-1080. https://doi.org/10.3109/02713683.2010.507839
Saw, S. M., Katz, J., Schein, O. D., Chew, S. J., & Chan, T. K. (1996). Epidemiology of myopia. Epidemiologic Reviews, 18(2), 175-187. https://doi.org/10.1093/oxfordjournals.epirev.a017924
Saw, S. M., Matsumura, S., & Hoang, Q. V. (2019). Prevention and management of myopia and myopic pathology. Investigative Ophthalmology & Visual Science, 60(2), 488-99. https://doi.org/10.1167/iovs.60.2.488
Smith III, E. L., & Hung, L. F. (2000). Form-deprivation myopia in monkeys is a graded phenomenon. Vision Research, 40(4), 371-381. https://doi.org/10.1016/S0042-6989(99)00175-3
Tang, W. C., Yap, M. K., & Yip, S. P. (2008). A review of current approaches to identifying human genes involved in myopia. Clinical and Experimental Optometry, 91(1), 4-22. https://doi.org/10.1111/j.1444-0938.2007.00280.x
Tsai, D. C., Fang, S. Y., Huang, N., Hsu, C. C., Chen, S. Y., Chiu, A. W., & Liu, C. J. (2016). Myopia development among young schoolchildren: The myopia investigation study in Taipei. Investigative Ophthalmology & Visual Science, 57(15), 6852-6860. https://doi.org/10.1167/iovs.16-19933
Whitmore, W. G., Curtin, B. J., & Fox, D. (1993). The modulation of ocular growth in rabbits with peripheral retinal ablation. Ophthalmology, 100(7), 1003-1008. https://doi.org/10.1016/S0161-6420(93)31280-3
Wisely, C. E., Sayed, J. A., Tamez, H., Zelinka, C., Abdel-Rahman, M. H., Fischer, A. J., & Cebulla, C. M. (2017). The chick eye in vision research: An excellent model for the study of ocular disease. Progress in Retinal and Eye Research, 61, 72-97. https://doi.org/10.1016/j.preteyeres.2017.06.002
Zhu, J., Zhang, E., & Del Rio-Tsonis, K. (2012). Eye anatomy. eLS. https://doi.org/10.1002/9780470015902.a0000747.pub3