What type of astigmatism is indicated by the prescription +7.00 -3.00 x120?

The prescription +7.00 -3.00 x120 indicates compound hyperopic astigmatism. Understanding the components of the prescription is key to recognizing the type of astigmatism it represents.

In the prescription, the first number (+7.00) represents the spherical component, which indicates the eye has a positive power, confirming hyperopia (farsightedness). The second number (-3.00) indicates the cylindrical component, which addresses the astigmatism by providing a corrective power that is negative. This negative value means that the astigmatism is of the type that requires a diverging lens for correction.

The "x120" specifies the axis at which the cylindrical correction is applied, which is at 120 degrees. In compound hyperopic astigmatism, both meridians of the eye (i.e., one meridian with the spherical power and the other with the cylindrical power) have a positive power, with one meridian having a higher positive spherical power than the other meridian, which is being corrected by the negative cylinder.

This combination of a higher positive spherical value and a negative cylinder clearly identifies the case of compound hyperopic astigmatism, distinguishing it from other forms of astig