Iris cyst (Cysta iridis) is a pathological cavity in the eyeball. This disease belongs to the group of congenital pathologies of eye development. Iris cysts most often arise from unsealed avascular areas of the iris growth zones under the endothelium. The contents of the cyst cavity are lymph, enzymes and blood cells. The patient complains of the appearance of flickering dots and particles in the field of vision in front of the eye. In this case, complaints may intensify with horizontal movement of the eyeball or when closing the eyelid. On the affected side, photophobia and lacrimation occur.
In the presence of acute symptoms, differential diagnosis with acute inflammatory eye diseases is carried out. The first step is to examine the anterior segment of the eye using a slit lamp. When examining, it is better to focus not on the iris, but on the iridocorneal edge. The field of view is also examined using special tables. After this, other additional