During fining, what happens to the backside of the 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

During fining, what happens to the backside of the lens?

Explanation:
Fining smooths and finishes the lens surface, reducing tiny surface imperfections that scatter light. On the backside, those imperfections and any residual haze from earlier steps cause opacity. As progressively finer abrasives are used, the micro-scratches and irregularities are removed, so light can pass through with less scattering. The result is that the backside becomes almost clear. Beveling is a separate edge-finishing step for the frame, and lubrication coatings aren’t part of this finishing stage.

Fining smooths and finishes the lens surface, reducing tiny surface imperfections that scatter light. On the backside, those imperfections and any residual haze from earlier steps cause opacity. As progressively finer abrasives are used, the micro-scratches and irregularities are removed, so light can pass through with less scattering. The result is that the backside becomes almost clear. Beveling is a separate edge-finishing step for the frame, and lubrication coatings aren’t part of this finishing stage.

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