We appreciate your visit to An optician has just neutralized an unknown power lens with test lenses The test lens used to neutralize the power in the vertical is 2. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Final answer:
The correct prescription for the lenses that were neutralized with +2.00 and +3.00 diopters in the vertical and horizontal is -2.00 and -3.00 diopters respectively, indicating concave lenses typically used for myopia correction.
Explanation:
The correct answer is option c) -2.00 in the vertical and -3.00 in the horizontal. When an optician neutralizes the powers of an unknown lens using test lenses, the powers of the test lenses are of the opposite sign to the powers of the unknown lens. This is because to neutralize a lens, you must use a lens with equal and opposite power. In this case, a test lens of +2.00 diopters was used to neutralize the vertical power, and a test lens of +3.00 diopters was used to neutralize the horizontal power.
Therefore, the unknown lens must have a power of -2.00 diopters in the vertical and -3.00 diopters in the horizontal. This indicates that the lenses are concave (diverging), which is typically used for correcting myopia (nearsightedness) where the prescribed power is negative.
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