OCT Analysis of Retinal Pigment Epithelium in Myopic Choroidal Neovascularization: Correlation Analysis with Different Treatments.

Objective : The objective of this study was to analyze the status of the retinal pigment epithelium (RPE) by means of the spectral domain optical coherence tomography (SD-OCT) overlying the myopic neovascular lesions in the involutive phase, looking for any correlations between the status of the RPE and the size of the lesions and the type and duration of the treatment. Methods : SD-OCT examinations of 83 consecutive patients with myopic choroidal neovascularization (CNV) were reviewed and divided into two groups: group A, patients with CNV characterized by uniformity of the overlying RPE, and group B, patients with CNV characterized by non-uniformity of the overlying RPE. Results : The median lesion area, major diameter, and minimum diameter were, respectively, 0.42 mm 2 (0.30-1.01 mm 2 ), 0.76 mm 2 (0.54-1.28 mm 2 ), and 0.47 mm 2 (0.63-0.77 mm 2 ) in group A, and 1.60 mm 2 (0.72-2.67 mm 2 ), 1.76 mm 2 (1.13-2.23 mm 2 ), and 0.98 mm 2 (0.65-1.33 mm 2 ) in group B. These values were lower in group A than in group B ( p < 0.001). The number of treatments with a period free of disease recurrence for at least 6 months was greater ( p < 0.010) in group B (6.54 ± 2.82) than in group A (3.67 ± 2.08), and treatments include intravitreal anti-vascular endothelial growth factor injection, photodynamic therapy, or both. Conclusions : Our results showed that the size of myopic neovascular lesion influences the development of a uniform RPE above the lesion and therefore the disease prognosis. The presence of uniform RPE was found to be extremely important in the follow-up of patients with myopic CNV, as it influences the duration of the disease and the number of treatments required.