Prevalence of refractive errors in Mexican patients with keratoconus

Aníbal Cruz-Becerril,1 Alejandra Valdivia,1 Raúl Peralta,2 Ruth N Domínguez-Fernández,1 Marco A Castro-Reyes1 1Instituto Politécnico Nacional, Sección de Estudios de Posgrado e Investigación, Centro Interdisciplinario en Ci...

Full description

Bibliographic Details
Main Authors: Cruz-Becerril A, Valdivia A, Peralta R, Domínguez-Fernández RN, Castro-Reyes MA
Format: Article
Language:English
Published: Dove Medical Press 2015-06-01
Series:Clinical Optometry
Online Access:http://www.dovepress.com/prevalence-of-refractive-errors-in-mexican-patients-with-keratoconus-peer-reviewed-article-OPTO
id doaj-97bff7704c2e4996b3ae27b112035bc5
record_format Article
spelling doaj-97bff7704c2e4996b3ae27b112035bc52020-11-25T00:44:14ZengDove Medical PressClinical Optometry1179-27522015-06-012015default394422332Prevalence of refractive errors in Mexican patients with keratoconusCruz-Becerril AValdivia APeralta RDomínguez-Fernández RNCastro-Reyes MAAníbal Cruz-Becerril,1 Alejandra Valdivia,1 Raúl Peralta,2 Ruth N Domínguez-Fernández,1 Marco A Castro-Reyes1 1Instituto Politécnico Nacional, Sección de Estudios de Posgrado e Investigación, Centro Interdisciplinario en Ciencias de la Salud, Unidad Milpa Alta, 2Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México Background: The purpose of this study was to determine the prevalence of refractive errors in Mexican patients with keratoconus (KCN) and to describe their clinical characteristics.Methods: In this retrospective study, we reviewed the records of Mexican patients with KCN for the year 2012. Criteria for classifying refractive errors included the following: emmetropia -0.25 to +0.25 sphere, myopia >-0.25 sphere, hyperopia >+0.25 sphere, and astigmatism >-1.00 cylinder. Patient information was collected on refraction results, refractive diagnosis, slit-lamp examination, keratometry values, contact lens features, and best visual acuity with a contact lens. The prevalence of refractive errors was estimated by dividing the total number of eyes in the study by the number of refractive errors found.Results: The study population comprised 426 patients, including 785 eyes with KCN. KCN was found more frequently in males (55.6%) than in females. The mean patient age was 28.1±10.3 years, and there was a greater frequency of moderate KCN. Compound myopic astigmatism had a prevalence of 87.3% and was present in all grades, although there are other types of refractive errors. The spherical rigid contact lens was the most frequently adapted lens (96%), and the contact lens parameters varied with disease progression.Conclusion: The most common refractive error is compound myopic astigmatism, although there are many refractive errors that have not been described to date in the KCN population. The main lens used for correction is the spherical rigid contact lens. Finally, the parameters to adjust contact lenses change according to disease progression. Keywords: keratoconus, visual acuity, refractive errors, rigid contact lenshttp://www.dovepress.com/prevalence-of-refractive-errors-in-mexican-patients-with-keratoconus-peer-reviewed-article-OPTO
collection DOAJ
language English
format Article
sources DOAJ
author Cruz-Becerril A
Valdivia A
Peralta R
Domínguez-Fernández RN
Castro-Reyes MA
spellingShingle Cruz-Becerril A
Valdivia A
Peralta R
Domínguez-Fernández RN
Castro-Reyes MA
Prevalence of refractive errors in Mexican patients with keratoconus
Clinical Optometry
author_facet Cruz-Becerril A
Valdivia A
Peralta R
Domínguez-Fernández RN
Castro-Reyes MA
author_sort Cruz-Becerril A
title Prevalence of refractive errors in Mexican patients with keratoconus
title_short Prevalence of refractive errors in Mexican patients with keratoconus
title_full Prevalence of refractive errors in Mexican patients with keratoconus
title_fullStr Prevalence of refractive errors in Mexican patients with keratoconus
title_full_unstemmed Prevalence of refractive errors in Mexican patients with keratoconus
title_sort prevalence of refractive errors in mexican patients with keratoconus
publisher Dove Medical Press
series Clinical Optometry
issn 1179-2752
publishDate 2015-06-01
description Aníbal Cruz-Becerril,1 Alejandra Valdivia,1 Raúl Peralta,2 Ruth N Domínguez-Fernández,1 Marco A Castro-Reyes1 1Instituto Politécnico Nacional, Sección de Estudios de Posgrado e Investigación, Centro Interdisciplinario en Ciencias de la Salud, Unidad Milpa Alta, 2Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México Background: The purpose of this study was to determine the prevalence of refractive errors in Mexican patients with keratoconus (KCN) and to describe their clinical characteristics.Methods: In this retrospective study, we reviewed the records of Mexican patients with KCN for the year 2012. Criteria for classifying refractive errors included the following: emmetropia -0.25 to +0.25 sphere, myopia >-0.25 sphere, hyperopia >+0.25 sphere, and astigmatism >-1.00 cylinder. Patient information was collected on refraction results, refractive diagnosis, slit-lamp examination, keratometry values, contact lens features, and best visual acuity with a contact lens. The prevalence of refractive errors was estimated by dividing the total number of eyes in the study by the number of refractive errors found.Results: The study population comprised 426 patients, including 785 eyes with KCN. KCN was found more frequently in males (55.6%) than in females. The mean patient age was 28.1±10.3 years, and there was a greater frequency of moderate KCN. Compound myopic astigmatism had a prevalence of 87.3% and was present in all grades, although there are other types of refractive errors. The spherical rigid contact lens was the most frequently adapted lens (96%), and the contact lens parameters varied with disease progression.Conclusion: The most common refractive error is compound myopic astigmatism, although there are many refractive errors that have not been described to date in the KCN population. The main lens used for correction is the spherical rigid contact lens. Finally, the parameters to adjust contact lenses change according to disease progression. Keywords: keratoconus, visual acuity, refractive errors, rigid contact lens
url http://www.dovepress.com/prevalence-of-refractive-errors-in-mexican-patients-with-keratoconus-peer-reviewed-article-OPTO
work_keys_str_mv AT cruzbecerrila prevalenceofrefractiveerrorsinmexicanpatientswithkeratoconus
AT valdiviaa prevalenceofrefractiveerrorsinmexicanpatientswithkeratoconus
AT peraltar prevalenceofrefractiveerrorsinmexicanpatientswithkeratoconus
AT dominguezfernandezrn prevalenceofrefractiveerrorsinmexicanpatientswithkeratoconus
AT castroreyesma prevalenceofrefractiveerrorsinmexicanpatientswithkeratoconus
_version_ 1725275551520784384