In the prescription -0.75 -1.00 x 090, what does the 090 denote?

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Prepare for the Shopko Optician Certification Test. Study with flashcards and multiple choice questions. Enhance your knowledge with detailed explanations and get ready to excel in your exam!

Multiple Choice

In the prescription -0.75 -1.00 x 090, what does the 090 denote?

Explanation:
The 090 denotes the axis of astigmatism correction, measured in degrees. In a prescription that includes sphere, cylinder, and axis, the cylinder value tells how much astigmatism is being corrected, and the axis specifies the orientation of that correction. The axis is given in degrees from 0 to 180, so 090 means the cylinder is oriented along a 90-degree line (vertical). The cylinder power applies in meridians perpendicular to this axis, while along the axis itself there is no cylinder effect. This value is not the sphere or cylinder power, nor is it a prism direction.

The 090 denotes the axis of astigmatism correction, measured in degrees. In a prescription that includes sphere, cylinder, and axis, the cylinder value tells how much astigmatism is being corrected, and the axis specifies the orientation of that correction. The axis is given in degrees from 0 to 180, so 090 means the cylinder is oriented along a 90-degree line (vertical). The cylinder power applies in meridians perpendicular to this axis, while along the axis itself there is no cylinder effect. This value is not the sphere or cylinder power, nor is it a prism direction.

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