mycotic corneal ulcer A corneal ulcer that is characterized by ulceration of the cornea secondary to fungal infection and is caused by minor trauma and subsequent infection by mycotic organisms, such as candida, aspergillus, fusarium, and rhizopus. SNOMEDCT_US_2025_09_01:59939007 disease_ontology UMLS_CUI:C0155071 DOID:10440 ICD10CM:H16.06 ICD9CM:370.05 corneal ulcer