The macula is
the area of the retina that provides the best vision- for reading
and fine detail. A hole in the macula can develop with
age
("idiopathic" macular hole), trauma and in very near sighted
people. Idiopathic macular holes are the most common, usually occurring
in patients over the age of 50 (see picture). These hole forms from
pulling by the vitreous gel on the center of the retina. Macular hole
formation occurs in stages beginning with a cyst (stage 1) and ending
with a full thickness hole with separation of the vitreous gel (stage
4). Reading and detail vision is ultimately lost.
Vitrectomy surgery may be used to remove
the vitreous gel and close the macular hole. Fine membranes (scar
tissue) are peeled from the edge of the hole and a gas bubble or
oil bubble is placed in the eye to help seal the hole while it heals.
When gas is used, the patient must remain face down for some time
after surgery to help the hole seal. If oil is used, it must be
removed in a second operation.
While most patients benefit, not all
patients recover vision. Success rates vary depending on the type
of hole, the duration of the hole and the stage of the hole. The
other eye may become affected in 10% or so of patients. As with
all surgeries, the risks, benefits and alternatives must always
be considered.
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The Retina
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Macular Diseases
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