Posters

Epithelial mapping in different degrees of myopia

Poster Details

First Author: S.Shah INDIA

Co Author(s):    S. Shah   O. Pirdankar                 

Abstract Details

Purpose:

To evaluate epithelial mapping in emmetrope and different degrees of myopia.

Setting:

Isha Netralaya, Kalyan, Maharashtra, India.

Methods:

Its a prospective study design where emmtrope and myopes aged between 20 to 35 years were included. The patients with hyperopia and astigmatism >-1.75 diopters (D), best corrected visual acuity (BCVA) worse than 0.2logMAR, IOP >22 mmHg; any previous ocular surgery; ocular diseases, systemic illness were excluded. All patients underwent Ophthalmic evaluations including refraction, BCVA, keratometry, intraocular pressure (IOP), slit-lamp examination. Epithelial Mapping was done using SD-OCT device (Optovue, Inc.). Anterior segment module with the newly released software was used to map corneal epithelial thickness covering 9-mm diameter at different regions (superior, nasal, inferior and temporal) and eccentricities (5,7,9 mm).

Results:

Total of 182 eyes (Normal:98 , mild myopia: 42,moderate myopia: 23, high myopia: 19) were analysed. Central corneal thickness, IOP and Noninvasive tear break up time was similar in all the groups (p>0.05). The spherical equivalent refraction in normal, mild, moderate and high myopes were significantly different (p<0.05). One way Anova revealed statistical significant difference in epithelial thickness in superior and nasal region at all eccentricities (p<0.05). In inferior region, epithelial thickness were similar at 5 and 9mm eccentricities among all groups whereas In temporal region, epithelial thickness were similar at 7 and 9mm eccentricities among all groups.

Conclusions:

Epithelial thickness varies among the different degrees of myopia. This suggest the need of epithelial mapping before conducting any refractive procedure.

Financial Disclosure:

None