Answer :
Final answer:
Transposing a prescription in optics involves recalculating the sphere, cylinder, and axis of the given values. Comparatively, in the options given, properties of sphere and cylinder either remain the same or change their signs, whereas the axis varies in different ranges.
Explanation:
Transposing a prescription in optics involves recalculating the sphere, cylinder, and axis of a prescription for glasses. The prescription provided, -3.00 -2.00 x 30, has a sphere of -3.00, cylinder of -2.00 and axis of 30.
For the transpositions:
- -3.00 +2.00 x 30: The sphere changes sign and the sign of the cylinder converts to positive. The axis remains as is.
- -3.00 -2.00 x 60: The sphere and cylinder properties remain the same but the axis changes to 60.
- -3.00 -2.00 x 90: Similar to option b, the sphere and cylinder properties remain the same but the axis changes to 90.
- -3.00 +2.00 x 120: This transposition changes the sphere to negative, the cylinder to positive and changes the axis to 120.
These transformations represent different orientations and magnitudes of the refractive error that the glasses are meant to correct.
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