Ocular Myasthenia Gravis
Myasthenia gravis
is an autoimmune disease that affects
the receptors for
acetylcholine at the neuromuscular junction
.
Ocular myasthenia
gravis is a type of myasthenia gravis that only
affects the eyes and eyelid movement. The hallmark
of ocular myasthenia gravis is eye muscle weakness
that increases during activity and improves after
rest.
Some individuals with myasthenia gravis develop
thymomas (tumors of the thymus gland). Thymomas are
generally benign, but they can become malignant.
Symptoms :
·
Drooping of one
or both eyelids
·
Double vision and variable
ocular deviations .
Tests For MG :
Clinical
Tests
There are two special
clinical tests that the doctor might perform looking
for MG. These are the ice test and the Tensilon
test.
Blood Test :
acetylcholine
receptor antibodies.
Nerve Conduction Study & (EMG)
(CT)
Scan for the thymus
Treatment Options
Medications
: anticholinesterase agents
such as neostigmine and pyridostigmine
Thymectomy
Assistive Devices :
Eyelid crutches ,
Eyelid
tape , Eyeglass prisms
Prognosis for Ocular Myasthenia
Gravis
In most
cases, ocular
myasthenia gravis is
usually the earliest form of myasthenia gravis to
appear. More than 50 percent of people with ocular
myasthenia gravis will develop
generalized myasthenia gravis
.
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