Rods
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2-1-385
Special retinal receptor elements which are presumed to be primarily concerned with perception of light stimuli, when the eye is adapted to darkness.
Note: The rods probably play no part in colour stimulus discrimination (see "scotopic vision", 2-1-335).
Reference: C.I.E.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
