Answer :
Final answer:
The prescription in minus cylinder form, based on the retinoscopy findings of +3.00 in the 180 meridian and -2.00 in the 090 meridian, is -3.00 sphere and +2.00 cylinder at an axis of 090, also written as option d. -3.00+2.00x090.
Explanation:
To convert the retinoscopy findings into a prescription in minus cylinder form, we need to identify the most minus meridian and use it as the sphere for the prescription. Correct option is d.
In the given case, Ret yielded +3.00 in the 180 meridian and -2.00 in the 090 meridian. To determine the sphere power for the prescription, we take the more plus meridian or the less negative meridian, which is +3.00 diopters at 180°.
Next, we need to calculate the cylinder power by subtracting the power of the opposite meridian from the sphere power, which gives us -2.00 - (+3.00) = -5.00 diopters.
The axis for the cylinder is perpendicular to the meridian of its power, so if the cylinder's power is found in the 090° meridian, the axis will be 180°.
Therefore, the correct prescription in minus cylinder form would be -2.00 diopters of sphere and -5.00 diopters of cylinder at an axis of 180°, which corresponds to the option -3.00+2.00x090.
