Fig. 4From: Case report: an unusual unilateral pterygium — a secondary pterygium caused by parasitosis in the scleral fistulaPostoperative image of the patient’s right eye. The incision recovered well after excising the pterygium and removing the worm (a). Magnified image shows that the fistula, where the worm living inside, turned into a black spot (white square) during the healing process (b)Back to article page