Below is an OCT of the right eye macula. An OCT takes a cross-sectional view of the retina. The macula is the part of the retina that serves the center of your vision. You can see the dome-shaped space under the retina by the fovea (the exact center of the macula). This dome-shaped space is focal detachment of the retinal pigment epithelium. The patient see’s 20/20. Below that is an RPE detachment from another patient. Notice the double dome.