Which option lists the four common cylinder options exactly?

Which option lists the four common cylinder options exactly?

• A. -0.75, -1.25, -1.75, -2.25
• B. -0.50, -0.75, -1.25, -1.75
• C. -0.75, -1.25, -2.25, -3.00
• D. -0.75, -1.25, -1.75, -2.50

Answer: (A)

In soft toric lenses, the cylinder power corrects astigmatism and is typically provided in a standard set of discrete values. The most common four negative cylinder powers stocked and used in practice are -0.75, -1.25, -1.75, and -2.25 diopters, increasing in 0.50 diopter steps. This particular group covers the majority of astigmatic needs seen in patients and is what manufacturers commonly supply for quick fitting and ordering. Other sets that include values like -0.50 or -3.00 don’t match the typical four-value group most practitioners rely on, so they aren’t the standard four common options.

In soft toric lenses, the cylinder power corrects astigmatism and is typically provided in a standard set of discrete values. The most common four negative cylinder powers stocked and used in practice are -0.75, -1.25, -1.75, and -2.25 diopters, increasing in 0.50 diopter steps. This particular group covers the majority of astigmatic needs seen in patients and is what manufacturers commonly supply for quick fitting and ordering.

Other sets that include values like -0.50 or -3.00 don’t match the typical four-value group most practitioners rely on, so they aren’t the standard four common options.