Figure 1: Macular image segmentation using the custom-built software (OCTRIMA). (A) The image of a healthy macula scanned by STRATUS OCT. (B) The same OCT scan processed with OCTRIMA. Ch: choroid; GCL+IPL: Ganglion Cell Layer and Inner Plexiform Layer complex; INL: Inner Nuclear Layer; ONL+IS: Combined Outer Nuclear Layer and Inner Segment of Photoreceptors; OS: Outer Segment of Photoreceptors; OPL: Outer Plexiform Layer; RNFL: Retinal Nerve Fiber Layer; RPE: Retinal Pigment Epithelial Layer; V: Vitreous. Note that OCTRIMA measures the thickness of the total retina between the inner limiting membrane and the inner boundary of the photoreceptor outer segment/RPE junction. The thickness of the combined ONL+IS structure is measured between the outer boundary of OPL and the inner boundary of the photoreceptor outer segment/RPE junction.