System of notation for photocoagulation in the presumed ocular histoplasmosis syndrome.

Using a notation system for evaluation of photocoagulatin of the choroidal neovascular membrane (CNVM) in presumed ocular histoplasmosis syndrome (POHS) demonstrated several advantages, which are: (1) a projector system which allowed excellent magnification of the CNVM and its distance from the foveal avascular zone (FAZ); (2) direct study of fluorescein angiographic negatives; (3) good comparison of pretreatment of posttreatment lesions in relation to FAZ; (4) a precise measurement of the surface area of each CNVM and its distance from the FAZ; and (5) an accurate and rapid way of recording and comparing data. This notation system appears valuable as a means of standardizing the examination and photographic findings from multiple institutions. Results of photocoagulatin of the CNVM are presented. Photocoagulatin of the entire CNVM appeared more effective than partial photocoagulatin of the CNVM.