• Users Online: 377
  • Print this page
  • Email this page
Year : 2020  |  Volume : 32  |  Issue : 3  |  Page : 263-267

Analysis of age, gender, and refractive error-related changes of the anterior corneal surface parameters using oculus keratograph topography

1 Research Committee; Department of Optometry, Mashhad University of Medical Sciences, Mashhad, Iran
2 Department of Optometry, Mashhad University of Medical Sciences, Mashhad, Iran
3 Department of Optometry; Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

Correspondence Address:
Asieh Ehsaei
Department of Optometry, Mashhad University of Medical Sciences, Parastar 2, Ahmadabad Avenue, Mashhad
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JOCO.JOCO_7_20

Rights and Permissions

Purpose: To assess refractive error, gender, and age-related differences in corneal topography of a normal population with Oculus Keratograph 4. Methods: This cross-sectional study included a total of 500 normal eyes of 500 individuals with ages ranging from 10 to 70 years. All participants underwent detailed ocular examinations, including visual acuity measurement, slit-lamp examination, and refractive error evaluation. Slit-lamp examination was performed for all individuals to rule out apparent corneal diseases. Corneal topography parameters were assessed using Oculus Keratograph. The data were analyzed based on gender, refractive error, and age groups using independent sample t-test and one-way analysis of variance. Results: Of a total of 500 participants (age: 29.51 ± 11.53 years) recruited for the present study, 66.4% were female, and 33.6% were male. The mean spherical equivalent of refraction was − 0.98 ± 1.65 diopters. Significant differences were noted in steep keratometry (P = 0.035) and corneal astigmatism (P = 0.014) between genders. Assessment of the data based on refractive error revealed significant differences in an index of vertical asymmetry (P < 0.001), index of height asymmetry (P = 0.003), and index of height decentration (P = 0.011). Considering age groups, significant differences were observed in flat keratometry readings (P < 0.001), mean corneal astigmatism (P = 0.02), minimum radius of curvature (P = 0.037), and apex power (P < 0.001). Conclusions: There was a prominent variation in some topographic parameters based on gender, age, and refractive error. The information on corneal parameters obtained with Oculus Keratograph from normal eyes provides a reference for comparison with diseased corneas.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded281    
    Comments [Add]    
    Cited by others 2    

Recommend this journal