Which condition involves severe irreversible loss of central vision?

Which condition involves severe irreversible loss of central vision?

• A. Closed-angle glaucoma
• B. Open-angle glaucoma
• C. Cataracts
• D. Age-related macular degeneration

Answer: (D)

Central vision is produced by the macula, a small area of the retina focused on fine detail. Age-related macular degeneration damages the macula, causing a severe loss of central vision while usually sparing peripheral vision. In advanced stages this central loss becomes irreversible because the macular photoreceptors and supporting tissues deteriorate. The dry form progresses slowly with gradual blur and a central blind spot, while the wet form can cause rapid central vision decline due to abnormal blood vessel growth. In contrast, cataracts blur vision in a more general way but are treatable with surgery, and glaucoma typically starts with peripheral vision loss due to optic nerve damage rather than immediate central degeneration. So the pattern of severe, irreversible central vision loss points to age-related macular degeneration.

Central vision is produced by the macula, a small area of the retina focused on fine detail. Age-related macular degeneration damages the macula, causing a severe loss of central vision while usually sparing peripheral vision. In advanced stages this central loss becomes irreversible because the macular photoreceptors and supporting tissues deteriorate. The dry form progresses slowly with gradual blur and a central blind spot, while the wet form can cause rapid central vision decline due to abnormal blood vessel growth. In contrast, cataracts blur vision in a more general way but are treatable with surgery, and glaucoma typically starts with peripheral vision loss due to optic nerve damage rather than immediate central degeneration. So the pattern of severe, irreversible central vision loss points to age-related macular degeneration.