This slit-lamp photo shows a large, central corneal ulcer that was caused by fusarium fungus. Classically, fungal ulcers are described as gray, feathery borders, with satellite lesions. In reality, the only way to determine the real pathologic cause is with a good culture (molds take forever to grow and require a deep sample) and time course.

This photograph is extremely magnified view of the cornea and a little dark, and as such is probably difficult for you to interpret. Watch our fungal ulcer video to get a better idea how this particular ulcer looks.