The Pigment Dispersion Syndrome (PDS) is an interesting degenerative disorder of the iris which may or may not cause problems for the patient.
Features of the pigment dispersion syndrome:
(1) Melanin pigment is released from the iris pigment epithelium, possibly by mechanical disruption of a backward bowing of the iris rubbing against the lens.
(2) The pigment is dispersed by the flow of aqueous fluid, often into the anterior chamber.
(3) The pigment may be deposited onto the posterior cornea, trabecular meshwork and other surfaces of the anterior chamber.
(4) The pigment may also be deposited along the posterior capsule of the lens.
where:
• Pigment deposits may range from punctate or dust-like to dense.
• Pigment deposits on the posterior surface of the cornea may take the form of a Krukenberg spindle.
Complications:
(1) pigmentary glaucoma
(2) iris atrophy with transillumination of the iris near its base
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