Which prescription would correct hyperphoria?

Which prescription would correct hyperphoria?

• A. OD -0.75 sph 2△ BU; OS -1.00 sph 2 △ BD
• B. OD -1.00 sph 2△ BU; OS -0.75 sph 2 △ BD
• C. OD -0.50 sph 2△ BU; OS -0.50 sph 2 △ BD
• D. OD -1.50 sph 2△ BD; OS -1.00 sph 2 △ BU

Answer: (A)

Hyperphoria is a condition characterized by a misalignment of the eyes, where one eye tends to drift upward relative to the other. To correct hyperphoria, the appropriate prism must be prescribed in a way that realigns the visual axes of the eyes. In the correct choice, a prism is prescribed for one eye that is based on the degree of upward deviation needed, indicated by the base up (BU) for the right eye (OD) and base down (BD) for the left eye (OS). This configuration effectively serves to shift the position of the right eye downward and the left eye upward, thereby addressing the condition of hyperphoria. The specific prescription of -0.75 sphere with 2△ base up for the right eye, alongside -1.00 sphere with 2△ base down for the left eye, provides the appropriate correction by aligning the visual pathways of both eyes. It helps to balance the vertical disparity caused by hyperphoria, allowing for improved binocular vision. The other choices do not provide the necessary combination of prisms or spherical corrections specific to hyperphoria, thus failing to adequately address the condition.

Hyperphoria is a condition characterized by a misalignment of the eyes, where one eye tends to drift upward relative to the other. To correct hyperphoria, the appropriate prism must be prescribed in a way that realigns the visual axes of the eyes.

In the correct choice, a prism is prescribed for one eye that is based on the degree of upward deviation needed, indicated by the base up (BU) for the right eye (OD) and base down (BD) for the left eye (OS). This configuration effectively serves to shift the position of the right eye downward and the left eye upward, thereby addressing the condition of hyperphoria.

The specific prescription of -0.75 sphere with 2△ base up for the right eye, alongside -1.00 sphere with 2△ base down for the left eye, provides the appropriate correction by aligning the visual pathways of both eyes. It helps to balance the vertical disparity caused by hyperphoria, allowing for improved binocular vision.

The other choices do not provide the necessary combination of prisms or spherical corrections specific to hyperphoria, thus failing to adequately address the condition.