Determines losses in peripheral vision?

Determines losses in peripheral vision?

• A. Visual field testing (perimetry)
• B. Ophthalmoscopy
• C. Snellen chart
• D. Refraction test

Answer: (A)

Mapping the entire field of vision is what reveals peripheral vision losses. Visual field testing, or perimetry, presents stimuli at many different locations while you fixate on a central target and notes which spots you can see. This process creates a map of sensitivity across the visual field and detects areas where vision is reduced, such as blind spots or tunnel vision. This is essential for diagnosing conditions like glaucoma or neurological issues that affect peripheral sight. In contrast, ophthalmoscopy looks at the inside of the eye (retina and optic nerve) and doesn’t measure field sensitivity; the Snellen chart assesses central visual acuity; and refraction tests determine refractive errors to improve clarity of vision. So the test that determines losses in peripheral vision is visual field testing (perimetry).

Mapping the entire field of vision is what reveals peripheral vision losses. Visual field testing, or perimetry, presents stimuli at many different locations while you fixate on a central target and notes which spots you can see. This process creates a map of sensitivity across the visual field and detects areas where vision is reduced, such as blind spots or tunnel vision. This is essential for diagnosing conditions like glaucoma or neurological issues that affect peripheral sight. In contrast, ophthalmoscopy looks at the inside of the eye (retina and optic nerve) and doesn’t measure field sensitivity; the Snellen chart assesses central visual acuity; and refraction tests determine refractive errors to improve clarity of vision. So the test that determines losses in peripheral vision is visual field testing (perimetry).