A computer assisted AC impedance system is used to measure the DC volt
age-current (V-I) characteristics and AC impedance of a goat eye lens
using a two-probe Ag-AgCl electrode system. The measurement of the V-I
characteristics shows that when a DC voltage from 0 mV to 30 mV is ap
plied, the resultant current decreases from an initial value of 0.58 m
u A to 0.006 mu A. However, when the voltage is increases beyond 30 mV
, the current increases and reaches a value of 0.9 mu A at 100 mV. The
data on the frequency response (0.01-10 Hz) of the impedance of lens
tissue show an inverse relationship with frequency. The effect of vari
ous DC voltages, namely 0, 30, 50, 100 and 200 mV, on the impedance of
the eye lens is also investigated over a frequency range of 0.01-10 H
z. The measurement results for both V-I characteristics and AC impedan
ce further suggest the presence of a 30 mV voltage compartment in the
goat eye lens.