Morphology of the optic nerve disc in eyes with myopia in correlation to the refractive error

Introduction
To asses morphology of the optic nerve disc in correlation to the refractive error in eyes with myopia.

Material and methods
The examined group consisted of 47 patient (84 eyes), age 20 to 36 years (mean age 28 ± 4,5), with refractive error -4.00 Dsph to -14.25 Dsph ± 0.75 Dcyl. This group was divided into two subgroups according to value of refractive error. The control group contained matched persons according to the gender and age. The basic ophthalmological examination and scanning laser ophthalmoscopy with HRT retinal tomography were performed.

Results
In patients with moderate and high myopia there was an increase of the optic nerve disc area and volume, and area and volume of the neuroretinal rim in comparison to the emmetropic eyes.

Conclusions
In patients with high myopic eyes there was an increase of the area and depth of the optic nerve cup. The area of the optic nerve disc and the neuroretinal rim was found to be bigger as the refractive error increased in group of moderate myopia. There were no statistically significant differences of thescanning laser ophthalmoscopy with HRT parameters (C/D AR and L C/D R) of the cup to the area and the diameter of the disc between myopic and emmetropic eyes.