Figure 1. Retinal Anatomic Zones

Figure 1. Retinal Anatomic Zones

This illustration shows a schematic representation of an entire retina with superimposed anatomic zones (as defined by the UCLA CMV Retinopathy Study Group).  Using a standard direct ophthalmologic examination, only a small portion of the overall retina is visualized (all of zone 1 and some of zone 2).  Overall, zone 1 comprises less than 10% of the entire retina. The retina lines most of the inner wall of the back of eyeball and it is comprised of thin, multi-layered neural tissue; the retina receives and transmits images. The medial region is also known as the nasal region and the lateral region is also referred to as the temporal region.

The retinal anatomic zones are based on the classification in Holland GN, Buhles WC Jr, Mastre B, Kaplan HJ. A controlled retrospective study of ganciclovir treatment for cytomegalovirus retinopathy. Use of a standardized system for the assessment of disease outcome. UCLA CMV Retinopathy. Study Group.  Arch Ophthalmol. 1989;107:1759-66.

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