How does a normal foveal thickness map appear in terms of color and thickness range?

How does a normal foveal thickness map appear in terms of color and thickness range?

• A. Blue, 170-190 microns
• B. Red, 200-210 microns
• C. Green, 130-140 microns
• D. Yellow, 250-260 microns

Answer: (A)

In OCT foveal thickness maps, color shows how thick the retina is at each point—the foveal region, being the thinnest part of the retina, typically appears in blue. A healthy fovea has thickness around 170 to 190 micrometers, so seeing blue within this approximate range is the normal presentation. Colors that indicate thicker tissue, like green, yellow, or red, would suggest thicker than normal retina and are not characteristic of a typical healthy fovea.

In OCT foveal thickness maps, color shows how thick the retina is at each point—the foveal region, being the thinnest part of the retina, typically appears in blue. A healthy fovea has thickness around 170 to 190 micrometers, so seeing blue within this approximate range is the normal presentation. Colors that indicate thicker tissue, like green, yellow, or red, would suggest thicker than normal retina and are not characteristic of a typical healthy fovea.