Definition of "occluder" [occluder]

• An object that partially or completely impedes the amount of light reaching the eye (noun)
• An implement designed to temporarily block light to one eye (noun)
• A catheter-delivered device that blocks a hole in the wall of a heart. Often the occluder is designed with an umbrella-type design and is folded up until the catheter arrives at the area of the defect in the heart. Once in place the occluder is unfolded on both sides of the defect so that pressure from both sides keeps it in place. (noun)

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• "Dr. Gillespie closed Morgan's ASD with a septal occluder, a wire-mesh patch, in a catheterization laboratory in the Cardiac Operative and Imaging Complex."
• "For instance, seeing distinct parts of a surface interrupted by an occluder leads to perceptual experience as of a single surface (imagine seeing a dog behind a picket fence)."
• "With perception of pictorial stimuli confined to one hemisphere by the scleral contact lens occluder developed by Eran Zaidel (38), the subject merely had to point to select items in a multiple choice array in answer to various kinds of leading questions regarding his or her knowledge and feelings concerning the content of the pictures."