Which lenses are used to correct myopia (nearsightedness)?

Which lenses are used to correct myopia (nearsightedness)?

• A. Concave lenses
• B. Convex lenses
• C. Intraocular lens (IOL)
• D. Ocular prosthesis

Answer: (A)

Nearsightedness occurs when the eye focuses light in front of the retina, often because the eye is too long or the cornea is too steep. To correct this, you want to spread the incoming light slightly so the focus moves backward onto the retina. A concave lens does this by diverging light rays before they enter the eye, reducing the eye’s overall convergence and shifting the focal point back onto the retina. That’s why concave lenses are used to correct myopia. Convex lenses would do the opposite: they converge light more, moving the focal point even farther in front of the retina, which helps farsightedness, not myopia. An intraocular lens is implanted inside the eye, typically after cataract removal or during refractive surgery, and while it can correct vision, it’s not the standard external lens used to treat myopia. An ocular prosthesis is a cosmetic artificial eye and does not correct vision.

Nearsightedness occurs when the eye focuses light in front of the retina, often because the eye is too long or the cornea is too steep. To correct this, you want to spread the incoming light slightly so the focus moves backward onto the retina. A concave lens does this by diverging light rays before they enter the eye, reducing the eye’s overall convergence and shifting the focal point back onto the retina. That’s why concave lenses are used to correct myopia.

Convex lenses would do the opposite: they converge light more, moving the focal point even farther in front of the retina, which helps farsightedness, not myopia. An intraocular lens is implanted inside the eye, typically after cataract removal or during refractive surgery, and while it can correct vision, it’s not the standard external lens used to treat myopia. An ocular prosthesis is a cosmetic artificial eye and does not correct vision.