Which imaging test is most helpful for diagnosing AMD?

Which imaging test is most helpful for diagnosing AMD?

• A. Optical coherence tomography (OCT) showing macular fluid or drusen
• B. Fluorescein angiography can detect CNV
• C. Ultrasound
• D. Visual field testing

Answer: (A)

Diagnosing AMD hinges on visualizing macular structure to detect drusen, pigment changes, and any fluid from neovascularization. Optical coherence tomography provides high-resolution cross-sectional images of the retina, clearly showing drusen as elevations of the RPE and any intraretinal or subretinal fluid. This makes it the most helpful test for identifying AMD and monitoring treatment response, since you can see both dry changes and signs of wet AMD in one noninvasive, repeatable scan. Fluorescein angiography can reveal choroidal neovascularization by showing leakage patterns, and it’s useful as a supplementary test, but it requires dye injection and is more invasive. Ultrasound doesn’t resolve retinal details needed for AMD diagnosis, and visual field testing assesses function rather than retinal anatomy, so neither is suitable for diagnosing AMD.

Diagnosing AMD hinges on visualizing macular structure to detect drusen, pigment changes, and any fluid from neovascularization. Optical coherence tomography provides high-resolution cross-sectional images of the retina, clearly showing drusen as elevations of the RPE and any intraretinal or subretinal fluid. This makes it the most helpful test for identifying AMD and monitoring treatment response, since you can see both dry changes and signs of wet AMD in one noninvasive, repeatable scan.

Fluorescein angiography can reveal choroidal neovascularization by showing leakage patterns, and it’s useful as a supplementary test, but it requires dye injection and is more invasive. Ultrasound doesn’t resolve retinal details needed for AMD diagnosis, and visual field testing assesses function rather than retinal anatomy, so neither is suitable for diagnosing AMD.