[Fibronectins: a possible treatment of therapy-resistant corneal ulcers].

Fibronectin was isolated from a patient's plasma by affinity chromatography using gelatin-agarose. Biochemical and immunological tests proved the homogeneity of the fibronectin fraction. A therapy-resistant corneal ulcer following keratitis neuroparalytica was successfully treated with the isolated fibronectin. The ulcer healed within 26 days of fibronectin treatment (1 drop 6 X daily) and eight months have now passed without it recurring.