Occluder

An occluder is a device or substance used to block, obstruct, or shut off a passage, view, or function. It's most commonly used in a medical or scientific context to cover one eye during an eye exam or to block light or radiation in experiments. The purpose is to create a controlled environment for observation or measurement by eliminating distractions or interference. Occluders can vary in design, ranging from simple patches to more complex apparatuses depending on their specific application. Understanding the nature of an occluder necessitates consideration of its purpose, its material, and the specific conditions under which it's being used.

Occluder meaning with examples

• During the vision test, the ophthalmologist used a small, black occluder to cover my left eye, allowing them to assess the acuity of my right eye. This simple tool is crucial in determining the visual function of each eye separately and identifying any potential problems or need for corrective lenses.
• The scientists employed a specialized occluder made of lead to shield the detector from stray radiation. This protective measure ensured the accuracy of their measurements by eliminating any interference from external radiation sources, which could have compromised the experimental results.
• In his stage magic routine, the magician skillfully utilized an occluder, a strategically placed prop, to distract the audience, making a dove appear, giving them a false view while he executed a complex sleight of hand, creating the illusion that the bird had appeared from nowhere.
• The photographer carefully used an occluder, in the form of a piece of black card, to selectively block portions of the light during the long-exposure photograph to darken parts of the image and create a specific artistic effect.
• The researcher incorporated an electronically controlled occluder into their experiment to automatically interrupt the light source at precise intervals. This precise control enabled them to observe the response of the subject under varying levels of visual stimulation, with the controlled on-off cycle.