What is the average central macular thickness?

What is the average central macular thickness?

• A. The normal central macular thickness ranges from about 250 to 350 micrometers.
• B. 350 to 450 micrometers
• C. 150 to 250 micrometers
• D. 600 to 700 micrometers

Answer: (A)

Central macular thickness is the measurement of the retina’s thickness at the fovea, obtained with OCT. In healthy eyes, the average central thickness is around 250 μm, with a normal range typically cited near 250–350 μm depending on the device and population. This makes the range 250–350 μm the best fit for a normal, average value. Values well outside this range usually indicate pathology—thinning around 150–250 μm suggests thinning atrophy, while thickened measurements in the 350–450 μm or higher can indicate edema or other retinal swelling. Always refer to the device’s normative database, since exact numbers can vary slightly between platforms.

Central macular thickness is the measurement of the retina’s thickness at the fovea, obtained with OCT. In healthy eyes, the average central thickness is around 250 μm, with a normal range typically cited near 250–350 μm depending on the device and population. This makes the range 250–350 μm the best fit for a normal, average value. Values well outside this range usually indicate pathology—thinning around 150–250 μm suggests thinning atrophy, while thickened measurements in the 350–450 μm or higher can indicate edema or other retinal swelling. Always refer to the device’s normative database, since exact numbers can vary slightly between platforms.