[Recording system for the scotopic threshold response].
The scotopic threshold response (STR) is a newly investigated component of the electroretinogram. Since the STR reflects post-photoreceptoral processing in the retina at intensities near absolute threshold, the STR would be a useful index to evaluate the rod pathway in the proximal retina. A conventional ERG setup, however, involves difficulties in STR recording. Therefore we constructed a new recording system for the purpose. The characteristics of the apparatus are as follows: 1) A diffusing sphere provides full-field stimuli ranging from a very dim light near absolute threshold to a very bright light. 2) A remote-control system for changing filters is used to avoid breakdown of the dark-adapted status. 3) A software artifact rejection routine is used to exclude responses influenced by eye movements and blinks. Using the apparatus we have examined the human STR and generally confirmed the previous findings.
Wakabayashi
K
K
Department of Ophthalmology, School of Medicine, Kanazawa University, Japan.
Saitoh
Y
Y
Ishisaka
N
N
Segawa
Y
Y
Kawasaki
K
K
Horita
M
M
Matsuura
K
K
D000328:Adult; D003623:Dark Adaptation; D004596:Electroretinography / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D006801:Humans; D008297:Male; D010786:Photoreceptor Cells / Q000502:physiology; D012684:Sensory Thresholds