occluder
noun 3
Definitions
noun
1
An object that partially or completely impedes the amount of light reaching the eye.
2
An implement designed to temporarily block light to one eye.
3
A catheter-delivered device that blocks a hole in the wall of a heart, often having an umbrella-type design and folded up until the catheter arrives at the area of the defect in the heart. Once in place the occluder is unfolded on both side
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