Certified Paraoptometric (CPO) Practice Exam 2025

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Certified Paraoptometric Exam with our comprehensive quiz featuring multiple-choice questions. Each question is accompanied by hints and explanations, helping you build your knowledge and confidence. Get ready to excel in your career!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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.