Home About us Editorial board Search Ahead of print Current issue Archives Submit article Instructions Subscribe Contacts Login 
ORIGINAL ARTICLE
Year : 2019  |  Volume : 32  |  Issue : 3  |  Page : 1149-1153

Assessment of corneal biomechanics in young myopic individuals using ocular response analyzer


1 Department of Ophthalmology, Faculty of Medicine, Menoufia University, Menoufia, Egypt
2 Department of Ophthalmology, International Eye Hospital, Cairo, Egypt

Correspondence Address:
Omnia A Attia
Giza
Egypt
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/mmj.mmj_3_19

Rights and Permissions

Objective The aim of this study was to assess corneal biomechanical properties using the ocular response analyzer (ORA) in myopic young individuals with normal topography. Background The development in corneal refractive surgeries raises the necessity of studying corneal properties in detail. Corneal viscoelasticity, in terms of corneal biomechanics, is measured by ORA through the analysis of the corneal dynamic behavior when it is deformed by an air puff. The important parameters measured are corneal resistance factor (CRF) and corneal hysteresis (CH). Patients and methods This study included 116 myopic eyes, which were assessed by clinical examination, best corrected visual acuity examination, and corneal pentacam topography. CH and CRF were measured using ORA. Results The mean age in our study participants was 23.6 ± 2.9 years, and the mean of the spherical equivalent was −4.56 ± 2.4 (moderate myopia). The mean CRF was 9.7 ± 1.4 mmHg, while the mean CH was 10.0 ± 1.3 mmHg. As regards corneal topography, normal participants were recruited with the following measurements: Kmax (maximum keratometry) 44.3 ± 1.4 and the mean central corneal thickness (CCT) was 529.5 ± 12.7 μm. Correlation of CRF and CH values in this moderate myopic group were negatively correlated with the spherical equivalent. Both CH and CRF had positive linear correlation with CCT and Kmax, and negative correlation with age. Conclusion The ORA is used to measure CH and CRF by which the biomechanical changes of the cornea in different degrees of myopia can be detected. It was found that it is important when evaluating the corneal biomechanical properties to take CCT and myopic status into consideration.


[FULL TEXT] [PDF]*
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
    Viewed30    
    Printed0    
    Emailed0    
    PDF Downloaded8    
    Comments [Add]    

Recommend this journal