The Prevalence of Anisometropia in patients examined in Optometry clinic of Rehabilitation Faculty of Shahid Beheshti Medical University

Document Type : Original article

Authors

1 MSc in Optometry, optometrist of faculty Rehabilitation, Shahid Beheshti University of Medical Sciences. Tehran, Iran (Corresponding author) makhgary@yahoo.com

2 Surgeon and a specialist eye disease, Professor Faculty Rehabilitation, Shahid Beheshti University of Medical Sciences. Tehran, Iran

3 OD, Instructor faculty of Rehabilitation faculty, Shahid Beheshti University of Medical Sciences. Tehran, Iran

4 MS in Biostatistics, Instructor faculty Rehabilitation, Shahid Beheshti University of Medical Sciences. Tehran, Iran

5 PhD of optometry, Shahid Beheshti University of Medical Sciences. Tehran, Iran

Abstract

Background and Aim: Anisometropia is considered to be a causative factor in the pathogenesis of amblyopia and strabismus. This study aimed to determine the prevalence of anisometropia in patients examined in optometry clinic of Faculty of Rehabilitation of Shahid Beheshti Medical University from March 2008 to March 2009
 
Materials and Methods: In this cross sectional study, 600 files of patients examined in the optometry clinic of Rehabilitation Faculty of Shahid Beheshti Medical University in year 2008 / 2009 were analyzed. Variables included age, sex, anisometropia, type and amount of refractive error and eye health of anterior and posterior segment. Anisometropia was defined as spherical equivalent (SE) refraction difference 1.00D or more between two eyes.
 
Results: The prevalence of anisometropia was 12.5 %( 75 of 600patients). Out of 75 anisometropic patients, 40 were male (53.3%) and 35 were female (46.6%). From 75 anisometropic patients, 13.3 % (10 of 75) were amblyopic, 1.3% (1 of 75) was esotropia and 1.3% (1 of 75) was exotropia. The highest frequency of anisometropia was in age groups of 10-20 and 50-60 old years. The frequency of antimetropic anisometropia, anisoastigmatism, isomyopic and isohypermetropic were 33.3%, 46.7%, 13.3% and 6.7%, respectively.
 
Conclusion: The results of this research showed that anisometropia results in Amblyopia in the different age groups which were in accordance with previous studies. 

Keywords

References

Scheiman M, Bruce W. Clinical Management of Binocular Vision: Heterophoric Accommodative and Eye Movement Disorders. 2 nd Ed, Philadelphia: Lippincott Williams & Wilkins.2008: 474-475.
2 Huynh SC, Wang XY, Ip J, et al. Prevalence and associations of anisometropia and aniso-astigmatism in a population based sample of 6-year old children. Br J Ophthalmol. 2006; 90(5):597–601.
3. Almeder LM, Peck LB, Howland HC. Prevalence of anisometropia in volunteer laboratory and school screening populations. Invest Ophthalmol Vis Sci. 1990; 31(11):2448–2455.
4-Liang YB, Wong TY, Sun LP, et al. Refractive errors in a rural Chinese adult population the Handan eye study. Ophthalmology. 2009; 116(11):2119–2127.
5-Qin XJ, Margrain TH, To CH, Bromham N, Guggenheim JA. Anisometropia is independently associated with both spherical and cylindrical ametropia. Invest Ophthalmol Vis Sci. 2005; 46(11):4024–4031.
6. Rajavi J, Moezzi H Tariqhat-Monfared MH et al. An evaluation of refractive error variability during early childhood in southeastern Tehran (Persian). Scientific Journal of the Eye Bank of I.r. Iran. 1995; 1(1): 9-14
7. Hashemi H, Fotouhi A, Mohammady K .The age and gender- specific prevalence of refractive error in Tehran. Ophthalmic Epidemiology.2004; 11(3):213-225.
8. Donahue SP. Relationship between Anisometropia and the Development of Amblyopia. American Journal of Ophthalmology. 2006; 141(1):131-132.
9. Dobson V, Harvey EM, Miller JM, Candice –Donaldson CE. Anisometropia prevalence in highly astigmatism school – Aged population. Optom Vis Sci. 2008; 85(7): 512- 519
10. Mohammad L, Hashemi H, Khabazkhoob M et al . The prevalence of anisometropia and its associated factors in an adult population from Shahroud, Iran. Clinical and Experimental Optometry.  2013; 96(5):  455–459 
11. Yekta AA, Fotouhi A, Hashemi H, et al. The Prevalence of Anisometropia, Amblyopia and Strabismus in Schoolchildren of Shiraz, Iran. Strabismus. 2010; 18(3): 104-110.
12. Yekta AA, Khabazpoor M,Azizi E ea al.The prevalence of anisometropia, amblyopia and strabismus in schoolchildren of Bojnourd, Iran. Acta Ophthalmologica.2010; 88(2):442-446.
13. Ostadimoghaddam H, Fotouhi A, Hashemi H, et al.  The Prevalence of Anisometropia in Population Base Study. Strabismus. 2012; 20(4): 152-157
14. Grosvenor T. Primary Care of optometry. 5 nd ed, Hong Kong: Elsevier. 2007: 28-29.
15. Deng L ,Jane E. JE.  Anisometropia in Children from Infancy to 15 Years. Invest. Ophthalmol. Vis. Sci. 2012; 53 (7):3782-3787
16. Guzowski M, Fraser-Bell S, Rochtchina E, Wang JJ, Mitchell P. Asymmetric refraction in an older population: the Blue Mountains Eye Study. Am J Ophthalmol. 2003; 136(3):551-553.
17. Rosen bloomA.A, Morgan M.W.Rosenmloom&Morgan’s Vision and Aging. New York: Butterworth Heinemann.2007: 262
18. Ingram RM, Walker C. Refraction as a means of predicting squint or amblyopia in preschool siblings of children known to have these defects. Br J Ophthalmol. 1979; 63(4):238–242
19. Latvala ML, Paloheimo M, Karma A. Screening of amblyopic children and long-term follow-up. Acta Ophthalmol Scand. 1996; 74(5):488–492
The Scientific Journal of Rehabilitation Medicine
Volume 2, Issue 3 - Serial Number 3
September and October 2013
Pages 39-44

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History

  • Receive Date: 09 April 2013
  • Revise Date: 16 June 2013
  • Accept Date: 12 September 2013
  • First Publish Date: 23 September 2013

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