Which description accurately contrasts glaucoma with cataract regarding vision changes?

• A. Glaucoma causes halo or tunnel vision; cataract causes blurred vision
• B. Glaucoma causes blurred vision; cataract causes halo vision
• C. Glaucoma causes curtain vision; cataract causes tunnel vision
• D. Glaucoma causes floaters; cataract causes red eye

Answer: (A)

The main idea is that vision changes reflect where the problem is: glaucoma damages the optic nerve and narrows the visual field, while cataracts cloud the lens and blur what you see. In glaucoma, peripheral vision is lost first, so people may notice halos around lights or a constriction of their overall field (tunnel vision) as vision becomes limited to a central area. In cataracts, the lens becomes opaque, reducing clarity and causing blurred vision, with glare and colors appearing faded as the opacity grows.

So, the description that best fits clinical patterns is that glaucoma causes halo or tunnel vision and cataracts cause blurred vision. The other descriptions don’t align with the typical symptoms: blurred vision points to a lens issue (cataract) rather than optic nerve damage; halos or tunnel vision don’t describe cataracts; curtain vision, floaters, or red eye suggest other conditions such as retinal issues, vitreous changes, or inflammatory/infectious processes.