Abstract
From micropolarographic O2 measurements, it can be concluded that the isolated goldfish retina is sufficiently supplied with oxygen when 100% O2 is blown over the retina. The retinal O2 consumption amounts to about 60 microliters of O2 per milligram dry weight per hour. Small amounts (0.25% to 2.0%) of CO2 added to the O2 gas diminish the retinal pH, which is 7.0 to 7.1 in situ and after isolation. Moreover, CO2 strongly reduces the ERG amplitude.