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Refractive Status of Patients Attending Eye Clinics of the Public Health System from Aguascalientes, Mexico


Luis Fernando Barba-Gallardo, Luis Héctor Salas-Hernández, José Rafael Villafán-Bernal, Paloma del Sagrario Marín-Nájera, Diana Miranda García-López, Aquetzally Del Carmen López-Garcia, Itandehui Castro-Quezada


Supported by the Universidad Autónoma de Aguascalientes, México




Journal of Optometry


  • This paper aims to evaluate the prevalence of REs in a clinic from Aguascalientes, Mexico by analysing clinical records from the local public health system. 

  • Refractive errors (REs) are quite common globally, but no data have been published regarding their frequency in clinics from Mexico. 

  • A priori, the frequency of ametropias should be high as admixture ancestry from this region is mainly European and Amerindian, the regions with high prevalence worldwide.

  • This cross-sectional study was conducted on 2195 subjects from records of public optometry services during the year 2018. Information obtained included age, gender, sphere, cylinder and axis. 

  • The prevalence of myopia, hyperopia and astigmatism was determined by gender and age groups in paediatric and adult patients. 

  • Chi-square testing was applied to determine significant differences in prevalence across age groups and gender. A p-value <0.05 was considered significant.

  • In subjects under 18 years of age, the prevalence of emmetropia, astigmatism, myopia and hyperopia was 20.1%, 51.1%, 7.0% and 11.8%, respectively. In adults, emmetropia was present at a frequency of 20.1%, while 57.1% presented astigmatism, 12.4% hyperopia and 8.6% presented myopia. 

  • A significant association was observed between the presence of REs and age and gender.

  • In this first report of prevalence of REs from western Mexico, astigmatism was the most prevalent RE in children, adolescents and adults while the least common was myopia. 

  • Important differences were found in prevalence in comparison to national and international reports.