Topographic determination of corneal asphericity as a function of age, gender, and refractive error.
The aim of the study is to evaluate corneal asphericity in three diameters of 5, 6, and 7 mm, and to assess the effect of age, refractive error, and gender on asphericity. The study included 500 healthy subjects with a mean ± SD age of 29.51 ± 11.53 years. All analyses were based on the right eyes of the patients. Topographic data were analyzed using Oculus Keratograph 4. Mean ± SD corneal asphericity values of the study population in 5, 6, and 7 mm diameters were -0.21 ± 0.11, -0.24 ± 0.10, and -0.27 ± 0.11, respectively. The anterior corneal surface asphericity showed no correlation with either age, gender, or refractive error. The corneal asphericity shows a tendency for an increase with diameter and asphericity does not have a significant correlation with any factors of age, gender, and refractive error.
Department of Optometry, Mashhad University of Medical Sciences, Parastar 2, Ahmadabad Avenue, Mashhad, Iran.|Refractive Errors Research Center, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.
Negareh
N
Yazdani
Department of Optometry, Mashhad University of Medical Sciences, Parastar 2, Ahmadabad Avenue, Mashhad, Iran.
Leila
L
Shahkarami
Department of Optometry, Mashhad University of Medical Sciences, Parastar 2, Ahmadabad Avenue, Mashhad, Iran.|Refractive Errors Research Center, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.
Hadi
H
OstadiMoghaddam
Department of Optometry, Mashhad University of Medical Sciences, Parastar 2, Ahmadabad Avenue, Mashhad, Iran. ehsaeia@mums.ac.ir.|Refractive Errors Research Center, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran. ehsaeia@mums.ac.ir.
Asieh
A
Ehsaei
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D016022:Case-Control Studies; D003315:Cornea / Q000473:pathology*; D019781:Corneal Topography / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000175:diagnosis* / Q000503:physiopathology; D015203:Reproducibility of Results; D012737:Sex Factors; D055815:Young Adult
Age; Asphericity; Diameter; Gender; Refractive error