Answer :
Final answer:
The correct prescription based on the lensometer readings is option B) -2.00 -1.00 x 083, which indicates a spherical power of -2.00 diopters and a cylindrical power of -1.00 diopter for astigmatism correction at an axis of 83 degrees.
Explanation:
The subject of this question is related to optometry and involves interpreting a lensometer reading for the purpose of understanding a prescription for corrective lenses. A lensometer is a device used to verify the correct prescription in a pair of eyeglass lenses.
When the narrow/single line becomes clear at -2.00 diopters and the wide/triple lines clear at -3.00 diopters, with the axis being 083, this suggests that the lens has a spherical power of -2.00 diopters and an additional cylindrical power of -1.00 diopter to correct for astigmatism at an axis of 83 degrees.
Given these readings, the correct prescription should indicate both the spherical and cylindrical power along with the axis.
Therefore, the prescription based on the lensometer reading is: -2.00 -1.00 x 083. This accounts for both components of refractive error: the myopia (nearsightedness) and astigmatism, represented as the spherical and cylindrical values respectively.
