photo below shows Pigment Dispersion Syndrome.
courtesy of NY Eye and Ear Infirmary
Dispersion Syndrome is usually detected during routine eye examinations.
An early indication that PDS is present is the observation of a Krukenberg
Spindle in the eye.
Dispersion Syndrome occurs when flakes of the coloured part of the eye,
the iris, detach from the back of the iris and float freely in the liquid
in the eye (the aqueous humor). This, in itself, wouldn't cause problems;
however, if these flakes make their way to the drainage channel in the
eye, they can block or damage the meshwork covering the channel and
cause the pressure in the eye (the IOP, or intra-ocular pressure) to
rise, damaging the optic nerve. This can lead to Pigmentary Glaucoma.
everyone with PDS will get Pigmentary Glaucoma. Regular eye examinations
and medication can prevent the onset of glaucoma. Eye drops such as
Latanoprost (Xalatan), used once a day (usually at night) are prescribed
to lower the pressure in the eye. Laser treatment to break up the larger
particles of pigmentation can prevent the drainage channel becoming
blocked and/or the IOP rising. An operation to create a new drainage
channel is also available.
seems unclear as to why PDS occurs in some people and not others. Some
schools of thought believe that PDS is genetic, passed on through a
faulty gene(s). Others believe that the shape of the iris itself is
a contributory factor.
seems that two thirds of patients diagnosed with PDS are myopic (short-sighted).
One third of those diagnosed are hyperopic (long-sighted) or emmetropic
(no need to wear glasses for distance). There may be other factors,
as yet undiscovered, that link those diagnosed with this syndrome.
Content ęCopyright Tracy Armstrong April 2004-2015.