ABO NOCE Practice Test

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What does the term 'base down prism' refer to?

  1. A lens configuration

  2. A visual phenomenon

  3. A specific measurement

  4. A type of lens material

The correct answer is: A lens configuration

The term 'base down prism' specifically refers to a lens configuration where the thicker edges of the prism are oriented at the bottom, causing light to bend downward as it passes through the prism. This configuration is often used in optical devices to help correct certain types of visual issues, such as those experienced by individuals with convergence insufficiency or other binocular vision problems. By diverting light in a specific direction, base down prisms can aid in aligning images seen by each eye, helping the brain to process visual information more effectively. This particular lens configuration is a fundamental concept in optics and is widely utilized in the field of optometry and vision therapy. It is essential for practitioners to understand how and when to use a base down prism to optimize a patient’s visual experience.

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