Conjunctival amyloidosis. A, Clinical appearance at the limbus and adjacent bulbar conjunctiva. B, Histologic examination reveals the diffuse, amorphous extracellular eosinophilic material throughout the stroma. C, Congo red stain, under standard light, highlights the amyloid orange. D, On Congo red stain under polarization, amyloid exhibits birefringence with dichroism (orange and apple-green colors).