THE PREVALENCE OF REFRACTIVE ERRORS OF PATIENTS ATTENDING SHAHID DR ASO EYE TEACHING HOSPITAL IN SULAIMANIA GOVERNORATE

Authors

  • Tara Mahmood Hassan Department of Surgery, College of Medicine, University of Sulaimani, Kurdistan Region, Iraq.

DOI:

https://doi.org/10.17656/jsmc.10204

Keywords:

Refractive error, Spherical Equivalent and Aging

Abstract

Background 

Refractive error means that the shape of the eyes does not bend light correctly, resulting in a blurred image. The main types of refractive errors are myopia, hyperopia and astigmatism.

Objectives 

To determine the prevalence of refractive errors in patients that visited Shahid Dr Aso Eye Teaching Hospital in Sulaimania.

Methods

A descriptive cross-sectional study of patients examined at Shahid Aso Eye Teaching Hospital from Feb. to Oct. 2018. Subjects whom have considered had best corrected visual acuity by standardized subjective refraction of 6/12 or better. The refractive errors were classified by the spherical equivalent (SE): sphere+½ cylinder. Myopia were put in groups of as a SE more than−0.50 D, hyperopia as a SE more than+0.50 D, and emmetropia as a SE between −0.50 and +0.50, both included. Astigmatism equal or higher than 0.25 D in minus cylinder form was used. Exclusion criteria are patients with documented history of cataract extraction (pseudophakia or aphakia), amblyopia, refractive surgery or other corneal/ocular surgery. 

Results

A total of 355 randomly selected subjects of different age (10-80 year mean 33.90) were included. The estimated prevalence (95%, confidence interval) among all subjects were astigmatism (63.9%), myopia (18.8%), hyperopia (9.1%) and emmetropia (8.2%). The mean age of myopia was (27.12±15.7) year, hyperope was (50.8±7.5) year and astigmatism was (33.6±16.6) year. Compound myopic astigmatism was the most common type of astigmatism and against-the-rule astigmatism increasing with age.

Conclusions

Astigmatism is the most common refractive error in all age group and compound myopic astigmatism constitutes about half of it. Further programs and studies must be developed to address the refractive errors needs of the population in Sulaimania.

References

Lawrence MS, Azar DT, Myopia and models and mechanism of refractive error control. Ophthalmol Clin North Am. 2002; 15(1):127-133. DOI: https://doi.org/10.1016/S0896-1549(01)00002-5

Feldkamper M, Schaeffel F. Interactions of genes and environment in myopia. Dev Ophthalmol.2003;37:34-49. DOI: https://doi.org/10.1159/000072037

Fischer AJ, McGuire JJ, Schaeffel F, Stell WK. Light- and focus- dependent expression of the transcription factor ZENK in the chich retina. Nat Neurosci. 1999; 2(8):706-712. DOI: https://doi.org/10.1038/11167

Lee KE, Klein R. Changes in refractive error over a 5-year interval in the Dam Eye Study. Invest Ophthalmol. Vis Sci. 1999; 40(8):1645-1649.

Tarcy-Hornoch K, Ying-Lai M, Varma R, and Los Angeles Latino Eye Study Group. Myopic refractive error in adult Latinos: Los Angeles Latino Eye Study. Invest Ophthalmol. Vis Sci. 2006;47:1845-1852. DOI: https://doi.org/10.1167/iovs.05-1153

The Eye Diseases Prevalence Research Group: The prevalence of refractive errors among adults in the United States, Western Europe, and Australia. Arch Ophthalmol. 2004; 122:495-505. DOI: https://doi.org/10.1001/archopht.122.4.495

Wang Q, Klein B, Klein R, Moss S. Refractive status in the beaver Dam Eye Study. Invest Ophthalmol.Vis Sci. 1944;35:4344-4347.

Munoz B, West S, Rodriguez J, Sanchez R, Broman A, Snyder R, Klein R. Blindness, visual impairment and the problem of uncorrected refractive error in a Mexican-American population: Proyecto Ver. Invest Ophthalmol VIS Sci. 2002;43:608-614.

Guzowski M, Wang JJ, Rochtchina E, Rose KA, Mitchell P. Five-year changes in an older population: the blue Mountains Eye Study. Ophthalmology. 2003;110: 1364-1370. DOI: https://doi.org/10.1016/S0161-6420(03)00465-2

Gordon A. Refractive error in Puerto Ricon rural population. J Am Optom Assoc. 1990;61: 870-874.

Wang TY, Foster PJ, Tielsch JM, Chew SJ, Johnson GJ, Seah SK. Prevalence and risk factors for refractive errors in adult Chinese in Singapore. Invest Ophthalmol Vis Sci. 2000; 41: 2486-2494.

Sandhu RK, Munoz BE, Swenor BK, West SK.Refractive error and visual function difficulty in a latino Population. Ophthalmology. 2012;119:1731-1736. DOI: https://doi.org/10.1016/j.ophtha.2012.03.003

Rodriguez, N.M.; Romero, A.F The prevalence of refractive conditions in Puerto Rican adults attending an eye clinic system. J. Optom. 2014,7, 161-167. DOI: https://doi.org/10.1016/j.optom.2013.06.001

Published

2019-09-21

How to Cite

1.
Hassan T. THE PREVALENCE OF REFRACTIVE ERRORS OF PATIENTS ATTENDING SHAHID DR ASO EYE TEACHING HOSPITAL IN SULAIMANIA GOVERNORATE. JSMC [Internet]. 2019 Sep. 21 [cited 2024 Jun. 19];9(3):179-85. Available from: https://jsmc.univsul.edu.iq/index.php/jsmc/article/view/jsmc-10204

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