phenotype affects entity abnormal cornea morphology abnormal Bowman membrane morphology abnormal Bowman's membrane any structural anomaly of the layer of acellular matrix that lies beneath the corneal epithelium and above the corneal stroma, consists of randomly arranged collagen fibers in a condensed bed of intercellular substance, and provides stability and strength to the cornea MPheno.ontology MP:0008521 anterior limiting lamina of cornea anterior limiting lamina of cornea morphology phenotype