A minus lens is described as what?

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Prepare for the Shopko Optician Certification Test. Study with flashcards and multiple choice questions. Enhance your knowledge with detailed explanations and get ready to excel in your exam!

Multiple Choice

A minus lens is described as what?

Explanation:
Understanding how lens power is described helps explain this. A minus lens has negative optical power, meaning it is a diverging or concave lens. It spreads light rays rather than bringing them to a single point, which is useful for correcting myopia by shifting the eye’s focal point so distant objects are focused on the retina. That negative sign is why it’s described as minus. In contrast, a plus lens has positive power and converges light, a plano lens has zero power and doesn’t change convergence, and a bifocal lens combines two focal lengths for different viewing distances.

Understanding how lens power is described helps explain this. A minus lens has negative optical power, meaning it is a diverging or concave lens. It spreads light rays rather than bringing them to a single point, which is useful for correcting myopia by shifting the eye’s focal point so distant objects are focused on the retina. That negative sign is why it’s described as minus. In contrast, a plus lens has positive power and converges light, a plano lens has zero power and doesn’t change convergence, and a bifocal lens combines two focal lengths for different viewing distances.

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