Pathophysiology
PMD is an idiopathic, non-inflammatory condition. The thinning of the corneas may approach 20% of normal thickness. There may be an increase in the number of mucopolysaccharides in the corneal stroma. The Bowman's layer of the cornea may be absent, irregular, or have ruptured areas.
Read more about this topic: Pellucid Marginal Degeneration