The Open Ophthalmology Journal

ISSN: 1874-3641 ― Volume 13, 2019

Relative Proportion Of Different Types Of Refractive Errors In Subjects Seeking Laser Vision Correction

Talal A. Althomali*
Associate Professor, Taif University, Taif, Saudi Arabia



Refractive errors are a form of optical defect affecting more than 2.3 billion people worldwide. As refractive errors are a major contributor of mild to moderate vision impairment, assessment of their relative proportion would be helpful in the strategic planning of health programs.


To determine the pattern of the relative proportion of types of refractive errors among the adult candidates seeking laser assisted refractive correction in a private clinic setting in Saudi Arabia.


The clinical charts of 687 patients (1374 eyes) with mean age 27.6 ± 7.5 years who desired laser vision correction and underwent a pre-LASIK work-up were reviewed retrospectively. Refractive errors were classified as myopia, hyperopia and astigmatism. Manifest refraction spherical equivalent (MRSE) was applied to define refractive errors.

Outcome Measures:

Distribution percentage of different types of refractive errors; myopia, hyperopia and astigmatism.


The mean spherical equivalent for 1374 eyes was -3.11 ± 2.88 D. Of the total 1374 eyes, 91.8% (n = 1262) eyes had myopia, 4.7% (n = 65) eyes had hyperopia and 3.4% (n = 47) had emmetropia with astigmatism. Distribution percentage of astigmatism (cylinder error of ≥ 0.50 D) was 78.5% (1078/1374 eyes); of which % 69.1% (994/1374) had low to moderate astigmatism and 9.4% (129/1374) had high astigmatism.

Conclusion and Relevance:

Of the adult candidates seeking laser refractive correction in a private setting in Saudi Arabia, myopia represented greatest burden with more than 90% myopic eyes, compared to hyperopia in nearly 5% eyes. Astigmatism was present in more than 78% eyes.

Keywords: Relative proportion of types of refractive errors, Laser vision correction, Myopia, Hyperopia, Astigmatism, Saudi Arabia.

Article Information

Identifiers and Pagination:

Year: 2018
Volume: 12
First Page: 53
Last Page: 62
Publisher Id: TOOPHTJ-12-53
DOI: 10.2174/1874364101812010053

Article History:

Received Date: 29/09/2017
Revision Received Date: 15/02/2018
Acceptance Date: 14/4/2018
Electronic publication date: 30/04/2018
Collection year: 2018

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© 2018 Talal A. Althomali.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Taif University, PO Box 795, Code 21944, Taif, Saudi Arabia, Tel: 00966566889983, Fax: 00966127443818; E-mail:


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