Which condition leads to loss of peripheral vision, progressing to tunnel vision?

• A. Cataracts
• B. Glaucoma
• C. Diabetic retinopathy
• D. Presbyopia

Answer: (B)

Glaucoma is the condition that primarily leads to loss of peripheral vision, which can progressively develop into tunnel vision. This occurs due to increased intraocular pressure that damages the optic nerve. The loss of peripheral vision often goes unnoticed initially because the central vision remains intact for a time, allowing individuals to adapt without realizing their field of vision is narrowing. As the condition advances, the vision may be reduced to a small central area, resembling a tunnel.

Other conditions listed present different ocular challenges. Cataracts typically cause blurry vision and problems with glare, but they do not specifically result in peripheral vision loss. Diabetic retinopathy can lead to vision loss but usually affects central vision first due to damage to the retina from diabetes. Presbyopia is an age-related condition that affects near vision and does not lead to tunnel vision or peripheral vision loss. Understanding these differences helps in recognizing the specific visual impairments associated with glaucoma.