Lattice corneal dystrophy TGFBI type. A, Clinical appearance. Note the lattice lines (arrows). B, H&E stain shows scattered fusiform, eosinophilic material deposited in the anterior and mid-stroma. C, Congo red stain (orange) demonstrates that the fusiform deposits are amyloid. D, With Congo red stain, under polarized light, amyloid deposits exhibit dichroism (orange and apple green).