The patient was a 36-year-old male. Because of repeated redness and photophobia in his right eye for more than 3 years, he went to the ophthalmology clinic of the First Affiliated Hospital of Suzhou University. A whole body examination a few months ago showed no abnormalities. Eye examination: corrected visual acuity was 0.8 for the right eye and 1.0 for the left eye; Intraocular pressure was normal in the right eye and normal in the left eye 14.0 mmHg (1 mmHg =0.133 kPa); Superficial corneal infiltration in the right eye, pannus with neovascularization, clear cornea in the left eye; The pupils of both eyes are equal in size and respond normally to light. Thick iris blood vessels can be seen in the left eye at the iris collar (Quintessence Picture 1)。 Fluorescein fundus angiography in both eyes showed no abnormalities. Clinical diagnosis: recurrent keratitis of right eye; Thick iris vessels in the left eye.