When images do not focus properly on the retina, this condition is called?

When images do not focus properly on the retina, this condition is called?

• A. Ametropia
• B. Cataract
• C. Glaucoma
• D. MD

Answer: (A)

Images not focusing on the retina happen when the eye’s optics don’t bring light to a single sharp point on the retinal surface. That general problem is called ametropia. It includes nearsightedness (the focal point falls in front of the retina), farsightedness (the focal point falls behind the retina), and astigmatism (irregular curvature causes multiple focal lines). In a normal eye, the cornea and lens bend light to land precisely on the retina; when the eye is too long or too powerful, or the curvature is off, the focus shifts forward or backward, causing blurred vision. The other conditions listed are different: cataract is clouding of the lens, glaucoma is optic nerve damage, and macular degeneration affects the central retina rather than the focus.

Images not focusing on the retina happen when the eye’s optics don’t bring light to a single sharp point on the retinal surface. That general problem is called ametropia. It includes nearsightedness (the focal point falls in front of the retina), farsightedness (the focal point falls behind the retina), and astigmatism (irregular curvature causes multiple focal lines). In a normal eye, the cornea and lens bend light to land precisely on the retina; when the eye is too long or too powerful, or the curvature is off, the focus shifts forward or backward, causing blurred vision. The other conditions listed are different: cataract is clouding of the lens, glaucoma is optic nerve damage, and macular degeneration affects the central retina rather than the focus.