Ameboid ulcer is a feature of -
It is seen primary ocular herpes.Sometimes the margins of the dendritic ulcer enlarge and coalesce to form a large epithelial ulcer with a 'geographical' or 'ameboid' configuration</p. Reference:Comprehensive ophthalmology,AK Khurana,6th edition,page no.108
Parasitic corneal ulcer
Mycotic corneal ulcer
Herpetic corneal ulcer
Bacterial corneal ulcer
Cornea and sclera