Which surface is the front surface for aspheric spherical lens?

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Prepare for the Ophthalmic Optics Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which surface is the front surface for aspheric spherical lens?

Explanation:
The main idea is where the light first enters the lens. In an aspheric-spherical pair, the aspheric element is usually placed on the surface away from the incoming light path (the back surface) to correct aberrations while keeping the front surface simpler. Because of this labeling convention, the surface that functions as the front in terms of the optical path is the back surface of the lens. So, the front surface is the back surface.

The main idea is where the light first enters the lens. In an aspheric-spherical pair, the aspheric element is usually placed on the surface away from the incoming light path (the back surface) to correct aberrations while keeping the front surface simpler. Because of this labeling convention, the surface that functions as the front in terms of the optical path is the back surface of the lens. So, the front surface is the back surface.

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