Certified Paraoptometric (CPO) Practice Exam 2025

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What type of lenses are used to correct hyperopia?

Concave
Flat
Plus
Minus

The correct answer is: Plus

The appropriate type of lenses used to correct hyperopia, also known as farsightedness, are plus lenses. Hyperopia occurs when the eye is shorter than normal or the cornea has too little curvature, causing light rays to focus behind the retina. Plus lenses are convex; they are thicker in the center and thinner at the edges. This shape helps to converge light rays before they enter the eye, allowing them to focus directly on the retina instead of behind it. Concave lenses, which are used to correct myopia (nearsightedness), diverge light rays, while flat lenses do not contribute to refractive changes. The term "minus" typically refers to the prescription used for concave lenses and is not appropriate for hyperopia correction. Therefore, plus lenses are the correct choice for correcting hyperopia.