Iris cyst

Iris cysts
A photo showing an iris cyst in a Sphynx cat. The cyst is characteristically semi-transparent and casts a shadow on the iris.
A photo showing an iris cyst in a Sphynx cat. The cyst is characteristically semi-transparent and is attached to the pupil.

Iris cysts are hollow cavities in the eye filled with secretion. They come in various sizes, numbers, shapes, pigments and can be free-floating, attached to the pupillary margin or within the posterior chamber.[1] Most frequently iris cysts don't cause any issues, but they can cause problems like: "fly biting" behavior, corneal endothelial pigment, lens capsular pigmentation, altered iris movement, decreased aqueous outflow with subsequent glaucoma or block the vision when grown too big.[1] They can be acquired or innate. Possible causes are inflammation, drug-induced, uveitis, a trauma, tumor-induced, parasitic or implantation.[2] Most frequently iris cysts are benign and need no treatment. Sometimes iris cysts are causing problems and need to be deflated. Iris cysts can be treated with trans corneal diode laser treatment, fine-needle aspiration or surgical excision.[1] For the treatment of iris cysts is a conservative approach favored.[2]

  1. ^ a b c Davis, Rachel (Mathes) (July 2016). "Iris cysts - Canine". Animal eye clinic.
  2. ^ a b Georgalas, Ilias; Petrou, Petros; Papaconstantinou, Dimitrios; Brouzas, Dimitrios; Koutsandrea, Chrysanthi; Kanakis, Menelaos (June 2018). "Iris cysts: A comprehensive review on diagnosis and treatment". Survey of Ophthalmology. 63 (3): 347–364. doi:10.1016/j.survophthal.2017.08.009. PMID 28882598.