Eye-Fixation
Related Potential to Stimuli Simulating the Vision of an Older
Adult
K. Kazai, Y Abe, A. Yagi, T Nakano, K. Higuchi, & S. Yamamoto |
The
eye-fixation related potential (EFRP) is a type of visual evoked
potential (VEP). In the present study, the effects of simulating
the vision of an older adult {Nakano, Higuchi, & Yamamoto, 1996)
on the EFRP of young adults were investigated. The EFRP was measured
under three conditions: the N condition (original stimulus without
any image processing), the CS condition (simulation of a 70-year
old person's contrast sensitivity and spectral transmittance}, and
the C condition (simulation of a 70-year old person's contrast sensitivity).
The P65 (positivity with a peak latency of about 65 ms) and N110
(nagativily with a peak latency of about 110 ms) of the EFRP were
identified. There was no significant difference between the P65-N110
amplitude of the N condition and that of the CS condition. The peak
latency of P65 of the CS condition was longer than those of the other
two conditions. These results are in general agreement with previous
VEP studies that compared older and young adults. Therefore, these
results support the validity of the simulation. Key words: eye-fixation related potential (EFRP), aging, simulation, contrast sensitivity |