If an over-refraction on a gas permeable diagnostic lens results in Plano +1.50 X 95, what lens parameters might you order for the patient with the diagnostic lens of 43.50-2.00 9.2?

In this scenario, the over-refraction shows a result of Plano +1.50 X 95. This indicates that the patient requires an additional plus power in a cylinder correction of +1.50 at an axis of 95 degrees.

The patient's current diagnostic lens is 43.50-2.00, which denotes a base curve of 43.50, a spherical equivalent of -2.00, and a certain diameter represented by 9.2. When determining the parameters for the new lens to accommodate the over-refraction results, it is essential to focus on adjusting the spherical and cylindrical components based on the measurements obtained.

The correct response demonstrates a modification to two primary characteristics of the lens parameters:

1. The spherical power is adjusted from -2.00 to -1.50 (which results from taking away the cylinder adjustment from the original prescription due to the over-refraction).
2. The cylindrical power is adjusted to -0.50 at an axis of 95 (which is aligned with the observed over-refraction).

The lens parameters suggest that the flat K value was adjusted only slightly while bringing in a new cylindrical power, making it easier for the patient’s overall vision correction and ensuring comfort.

In essence, by