Introducing
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
Duane Syndrome
1
Duane Syndrome
Symptoms
-present from birth but may take several years to be diagnosed
-holding head in abnormal position
-crossing or misalignment of eyes
-closing one eye to see better
-double vision
-headaches
-difficulty seeing on side of affected eye
Cause
-genetic and environmental disturbances during embryonic development
-can be autosomal dominant or a single occurance in a family
-Mutations in the CHN1 (chimerin 1) gene located on chromosome 2
CHN1 gene
Type 2
-Provides instructions for making proteins; a1-chimaerin and a2-chimaerin
-Critial during formation of nerves in head and face
-The mutation overactivates the a2-chimaern
disrupting the growth of neurons resulting in muscles surround the eye not developing properly
-inability to move eye inward
What is Duane Syndrome?
Type 3
inability to move
eye in or out
Type 1
inability to move
eye outward
-miswiring of the eye muscles
-eye muscles may contract when
they should not or not contract when they should
Treatments
-limited ability to move the eye inward
or outward
-Surgery: goal is to eliminate or improve unacceptable head turns and misaligning eyes and reduce severe retraction.
-Visual Therapy
80% of cases only 1 eye is affected, usually left eye
Quality of Life
-Almost completely normal
-special seating in class for children
-special rear-view mirrors for driving