How does macular degeneration affect vision?

How does macular degeneration affect vision?

• A. A reversible detachment of the retina.
• B. A progressive loss of photoreceptors in the macula leading to central scotoma, causing reliance on peripheral vision.
• C. An increase in ocular pressure causing optic nerve damage.
• D. An inflammation of the sclera causing redness.

Answer: (B)

Macular degeneration erodes the central part of the retina where the macula—especially the fovea with its dense cones—provides our sharp, detailed vision. As photoreceptors in the macula deteriorate, central vision becomes blurred or a blind spot forms (a central scotoma). Because the peripheral retina outside the macula is relatively spared, people often compensate by using their peripheral vision for navigation and recognizing objects, while the center appears missing or distorted. This pattern—progressive loss of photoreceptors in the macula leading to central vision loss with preserved peripheral vision—is the hallmark of macular degeneration. Other eye problems described by the distractors involve different mechanisms: retinal detachment is an acute condition affecting the retina as a whole, glaucoma involves optic nerve damage from high pressure, and scleral inflammation causes redness. The macular degeneration description best matches the loss of central, high-acuity vision due to macular photoreceptor degeneration, with peripheral vision remaining usable.

Macular degeneration erodes the central part of the retina where the macula—especially the fovea with its dense cones—provides our sharp, detailed vision. As photoreceptors in the macula deteriorate, central vision becomes blurred or a blind spot forms (a central scotoma). Because the peripheral retina outside the macula is relatively spared, people often compensate by using their peripheral vision for navigation and recognizing objects, while the center appears missing or distorted. This pattern—progressive loss of photoreceptors in the macula leading to central vision loss with preserved peripheral vision—is the hallmark of macular degeneration.

Other eye problems described by the distractors involve different mechanisms: retinal detachment is an acute condition affecting the retina as a whole, glaucoma involves optic nerve damage from high pressure, and scleral inflammation causes redness. The macular degeneration description best matches the loss of central, high-acuity vision due to macular photoreceptor degeneration, with peripheral vision remaining usable.