Certified Paraoptometric (CPO) Practice Exam 2025

Disable ads (and more) with a membership for a one time $4.99 payment

Gear up for the Certified Paraoptometric (CPO) Exam 2025. Study with interactive quizzes and multiple-choice questions with comprehensive explanations. Excel in your exam with our tailored preparation tools!

Practice this question and more.

What type of lens is used to treat both myopia and hyperopia as well as astigmatism?

Spherical
Cylindrical
Planocylindrical
Spherocylindrical

The correct answer is: Spherocylindrical

Spherocylindrical lenses are specifically designed to address complex refractive error conditions such as myopia (nearsightedness), hyperopia (farsightedness), and astigmatism in one lens. The term "spherocylindrical" indicates that the lens combines both spherical and cylindrical components. The spherical portion corrects for myopia or hyperopia by altering the overall power of the lens, while the cylindrical component is used to correct astigmatism, which involves an irregular curvature of the cornea. This dual design allows a single lens to provide comprehensive correction for patients who may have multiple refractive errors, making it versatile and widely used in optometry for such conditions.