Question

Which is example of the Simple Myopic Astigmatism among the prescriptions given below:

• A. Rx (+) sphere
• B. Rx will be plano (-)
• C. Rx will be (-) sphere
• D. (-)(+) (+)(-) on both 90 and 180 degree axis

Answer 1

The Correct Option is B

In ophthalmology, simple myopic astigmatism is a refractive error where one meridian of the eye is nearsighted (myopic), while the other meridian is emmetropic (plano). To determine which prescription exemplifies simple myopic astigmatism, we can analyze the provided options:

• Rx (+) sphere: This describes a hyperopic or farsighted prescription for both meridians, not fitting the criteria for myopic astigmatism.
• Rx will be plano (-): This indicates one axis is plano (emmetropic), and the other has a negative (myopic) correction, fitting the definition of simple myopic astigmatism.
• Rx will be (-) sphere: This prescription applies myopic correction uniformly across both meridians, indicating simple myopia, not astigmatism.
• (-)(+)(+)(-) on both 90 and 180 degree axis: This suggests compound astigmatism, involving different corrections at each axis, which is more complex than simple myopic astigmatism.

Therefore, the correct example of simple myopic astigmatism is: Rx will be plano (-).