Just a quick response--in some respects, we do have that blind spot, which is why you can't look directly at a dim star at night if you want to see it. Furthermore, our eyes are never still, so even if we are looking at something, there is enough jitter for the foveal area to be filled in. The fovea is pretty darned small, as well. Also, memory is an amazing contributor to perception. Happy Friday, Carol
On Fri, Sep 7, 2018 at 1:47 PM Rick Stevens <[email protected]> wrote: > > TIPS had been quiet lately. A question occurred to me when talking about > rod vs cone functioning. > > When light levels get low, the cones lose function. Since the fovea is > 100% cones, why don't we have a blind spot in the center of our vision in > low light, low enough to lose color, but still enough light to move around > in a dark room. While the blind spots of right and left eyes can be > 'filled in' by information from the other eye, I would think that the > foveas would be aimed at exactly the same spot. > > My first thought would be the memory of looking close to some spot, > getting the information with the rods and remembering it when shifting my > gaze to that spot. I know memory stuff better than physiology stuff, so I > thought that there might be a better or at least a more physio-oriented > answer. > > Rick Stevens > School of Behavioral and Social Sciences > University of Louisiana at Monroe > > --- > > You are currently subscribed to tips as: [email protected]. > > To unsubscribe click here: > http://fsulist.frostburg.edu/u?id=177920.a45340211ac7929163a0216244443341&n=T&l=tips&o=52744 > > (It may be necessary to cut and paste the above URL if the line is broken) > > or send a blank email to > leave-52744-177920.a45340211ac7929163a0216244443...@fsulist.frostburg.edu > > -- Carol DeVolder, Ph.D. Professor of Psychology St. Ambrose University 518 West Locust Street Davenport, Iowa 52803 563-333-6482 --- You are currently subscribed to tips as: [email protected]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13090.68da6e6e5325aa33287ff385b70df5d5&n=T&l=tips&o=52745 or send a blank email to leave-52745-13090.68da6e6e5325aa33287ff385b70df...@fsulist.frostburg.edu
