MMP2 and epithelial basement membrane dystrophy: Based on our previous studies of MMP concentrations in the corneal epithelium of RCE patients [112], which detail the precise etiology of RCEs, comparative analysis of MMP-2 and MMP-3 concentrations in EBMD and traumatic RCEs, showed a trend towards higher concentrations in the former, which is an essential observation regarding the pathogenesis of this disease entity.