Letter: Evaluation of peripapillary – Macular microvascularity and choroidal vascularity index after refractive surgery

• Choroidal vascularity index (CVI) represents the ratio between vascular luminal and total choroidal areas. • Possible influence on binarization utilized in the CVI evaluation by the blooming effect. • Blooming effect consists of an artifact related to signal amplification in echography. • Presence of blooming effect also with OCT and its possible influence on CVI.