Which type of corrective lenses are needed for hyperopia?

Hyperopia, commonly known as farsightedness, occurs when the eye is too short relative to its focusing power, causing distant objects to be seen clearly while nearby objects appear blurry. To correct hyperopia, plus corrective lenses are required. These lenses are thicker in the center than at the edges, which helps converge the light rays entering the eye. This convergence assists in projecting the image more directly onto the retina, allowing for clearer vision at closer distances.

In contrast, minus corrective lenses are used to treat myopia or nearsightedness, where close objects are clear, but distant ones are not. Bifocal lenses incorporate two different prescriptions and are typically used for individuals who require correction for both distance and near vision but don't specifically address hyperopia on their own. Single vision lenses provide a uniform corrective power for either near or distance vision, but again, they may not specifically suit the needs of someone with hyperopia unless they are plus lenses.

Thus, plus corrective lenses are essential for those suffering from hyperopia because they correct the underlying issue of insufficient focusing power for near objects, enabling improved visual clarity.