To try to establish a "point by point" relationship between the local thickness of the retinal ganglion cell complex and its sensitivity. In total, 104glaucomatous eyes of 89patients with a confirmed 24-2 visual field, were measured by superimposing the visual field, using imaging software, with the Wide 40° by 30° measurements of retinal ganglion cell complex obtained from the Topcon© 3D 2000 OCT, after upward adjustment, inversion and scaling. Visual fields were classified into two groups according to the extent of the disease: 58mild to moderate (MD up to -12dB), and 46severe (MD beyond -12dB). The 6mm by 6mm central region, equipped with a normative database, was studied, corresponding to 16points in the visual field. These points were individually matched one by one to the local ganglion cell complex, which was classified into 2groups depending on whether it was greater or less than 70microns. The normative database confirmed the pathological nature of the thin areas, with a significance of 95 to 99%. Displacement of central retinal ganglion cells was compensated for. Of 1664points (16central points for 104eyes), 283points were found to be "borderline" and excluded. Of the 1381 analyzed points, 727points were classified as "over 70microns" and 654 points "under 70 microns". (1) For all stages combined, 85.8% of the 727points which were greater than 70microns had a deviation between -3 and +3dB: areas above 70microns had no observable loss of light sensitivity. (2) In total, 92.5% of the 428points having a gap ranging from -6 to -35dB were located on ganglion cell complex areas below 70microns: functional visual loss was identified in thin areas, which were less than 70microns. (3) Areas which were less than 70microns, that is 654points, had quite variable sensitivity and can be divided into three groups: the first with preserved sensitivity, another with obliterated sensitivity, and an intermediate group connecting the two previous ones. In pathologically thin areas, the distribution of these three functional groups seems to correspond to the progression of glaucomatous visual degradation, including a period of resistance, a period of rapid decline, finally leading to complete functional loss. In the studied area, the analysis of retinal ganglion cell complex is relevant to identify areas which are still functional when they exceed 70microns. Scotomas correspond to the thin areas less than 70microns. The functionality of areas which are pathologically thinned by glaucomatous degeneration is not correlated to their thickness. In the future, the correlation between structure and function, currently "regional" may be realized "point by point" once automation of the visual field superimposition is made available for the ganglion cell complex.