A patient wearing a -2.00 diagnostic soft lens with an over-refraction of -0.25 -0.50 x090 should be ordered which of the following lenses?

To determine the correct lens prescription for the patient, we start with the diagnostic lens they are wearing, which has a power of -2.00 D. The over-refraction given is -0.25 -0.50 x090.

The over-refraction indicates that the patient's visual acuity can be improved with an additional -0.25 D of spherical power and -0.50 D of cylindrical power at an axis of 090. The goal is to find the best spherical equivalent for the lens order.

First, we address the spherical component. The diagnostic lens is -2.00 D, and adding the over-refraction of -0.25 D results in a total spherical power of -2.00 -0.25 = -2.25 D.

Next, considering the cylindrical component from the over-refraction, while it provides additional correction to the astigmatism, the specification for this scenario focuses primarily on the spherical component when determining the lens order.

Therefore, the best choice for the lens to be ordered is -2.25 D spherical, which corresponds to the adjustment made from the original -2.00 D based on the over-refraction. Given this understanding, -2.25 spherical empowers the patient