Certified Paraoptometric Practice Test

What is the term for lenses that are used to correct nearsightedness?

1. Concave lenses

2. Cylinder lenses

3. Minus lenses

4. Plano lenses

The correct answer is: Concave lenses

The term for lenses used to correct nearsightedness is concave lenses. These lenses are designed with a thinner center and thicker edges, which helps diverge light rays before they enter the eye. In individuals with nearsightedness, or myopia, light entering the eye is focused in front of the retina. Concave lenses help to reposition the focal point on the retina, allowing individuals with myopia to see distant objects more clearly. In contrast, cylinder lenses are primarily used to correct astigmatism, and minus lenses refer to the power of concave lenses, but they are not a standalone classification. Plano lenses have no optical power and are typically used in non-prescription eyewear. Thus, concave lenses are the appropriate choice for addressing nearsightedness specifically.