Voissius ring is seen in the -
Vossius ring: It is a circular ring of brown pigment seen on the anterior capsule. It occurs due to striking of the contracted pupillary margin against the crystalline lens. It is always smaller than the size of the pupil. Ref : AK Khurana 6thE pg 430
Cornea
Anterior capsule of the lens
Posterior capsule of the lens
Iris
Ocular trauma 