Lesions of the anterior portion of the eye include Punctate (snowflake) keratitis (an acute inflammatory infiltrate surrounding dying microfilariae that resolves without causing permanent damage) Sclerosing keratitis (an ingrowth of fibrovascular scar tissue that may cause subluxation of the lens and blindness) Anterior uveitis or iridocyclitis (which may deform the pupil) Chorioretinitis, optic neuritis, and optic atrophy may also occur.