Myopia (nearsightedness) is a prevalent disease. In the myopic eye the light rays focus anteriorly to the retina. High or pathologic myopia is defined as spherical equivalent refractive error greater than 6.00 diopters (D) or axial length greater than 26.5mm3. Patients with high myopia are at a greater risk of developing progressive retinal degeneration and other vision threatening pathology, such as glaucoma, retinal detachment and myopic macular degeneration. The purpose of this retrospective study is to evaluate macular choroidal thickness (CT) in patients with high myopia, with enhanced depth imaging (EDI) using spectral domain optical coherence tomography (SD-OCT).

Materials and Methods:

Prospective study which included 20 patients with highly myopic eyes, who attended an ophthalmological consultation, after January 2014. All patients underwent a complete ophthalmological examination. Inclusion criteria were the presence of a high myopia, defined as spherical equivalent refractive error greter than 6,00 D. Exclusion criteria were clinical evidence of maculopathy or amblyopia and intraocular pressure (IOP) greater than 21 mmHg. The control group, with emmetropic eyes, was created based on the distribution of genres and ages of the sample. The emmetropic eyes were defined as spherical equivalent refractive error +/- 1,50 D, without another diseases affecting the eye. SD-OCT scans were analyzed, and subfoveal choroidal tickness was measured manually between the Bruch’s membrane and the internal aspect of the sclera. The eyes with high myopia were paired by age with patients with emmetropic eyes. Statistical analysis was performed to compare the two groups.

Results and Conclusions:

We will present our results on this topic to compare with the existing literature. Other studies have shown that choroidal thickness decreases with age and severity of myopia.