DOG RETINAL GANGLION-CELLS - A MORPHOLOGICAL AND MORPHOMETRICAL STUDYIN AGING

Using a reduced-silver method, this study examined ganglion-cell morph ology and morphometry in aging dog wholemount retina. The ganglion-cel l body size and topography were obtained using a semi-automatic image analyser (Leitz ASM 68K, Wetzlar, Germany) studying a sector (with an angle of 10 degrees centred on the optic papilla) as a sampling area f rom the superior, middle and inferior regions of nasal and temporal re tina. The ganglion-cell type and topography of the elder dog retina re sembled those of cat retina, with the exception of a lack of alpha cel ls in the peripheral area of the temporal retina. However, the morphol ogical and morphometrical features are not influenced by aging.