Transpose the following prescription into plus cylinder form: -2.00 -1.25 x 090:

To transpose a prescription from minus cylinder form to plus cylinder form, you need to follow specific steps. The given prescription is -2.00 -1.25 x 090.

First, identify the sphere and cylinder components. In this case, the sphere is -2.00 and the cylinder is -1.25, oriented at 90 degrees. To convert to plus cylinder form, you change the sign of the cylinder and need to adjust the sphere accordingly.

1. Change the cylinder from -1.25 to +1.25. This means you must add the cylinder value to the sphere.

2. When you add the cylinder value to the sphere, the calculation is: -2.00 + (-1.25) = -3.25. This is now the new sphere value.

3. The axis also needs to be changed. The axis rotates by 90 degrees when changing from minus cylinder to plus cylinder. Therefore, changing the axis from 90 degrees results in 180 degrees.

So, after transposing, the resulting prescription should be -3.25 +1.25 x 180. This matches with the provided answer C, making it the correct choice. Transposing requires careful handling of the sphere and cylinder