Which of the following is a late sign of glaucoma?

• A. Severe eye redness and discharge
• B. Halos, and loss of peripheral vision
• C. Sudden blindness in one eye
• D. Floaters with flashes of light

Answer: (B)

Glaucoma gradually damages the optic nerve, so the main functional change is a progressive loss of peripheral vision with relatively preserved central vision until late. When pressure has risen enough to cause corneal changes, patients may notice halos around lights. Seen together, halos with loss of peripheral vision indicate an advanced stage of glaucoma, reflecting irreversible field loss even while central acuity can remain okay for a time. The other options point to different eye emergencies or retinal issues: severe red eye with discharge suggests infection or uveitis, sudden unilateral blindness points to an acute event like retinal detachment or vascular occlusion, and floaters with flashes typically indicate vitreoretinal problems.