So you have more rods than most at the fovea, Chris? Or perhaps your blind
spot is slightly differently placed in each eye, giving you overlap – like the
optic nerve blind spot.
Chris
> On 31 Oct 2018, at 14:41, Chris Trask <christrask@xxxxxxxxxxxxx> wrote:
>
> I must have a very high number of rods, as my night vision is well above
> average. I also do not seem to have a night "blind spot".
>
>>
>>> It’s interesting to me because I lecture on vision as part of my job,
>>> and to day I’ve spoken only about rods and cones (and photo-sensitive
>>> ganglion cells), never about the 3-colour properties of most people’s
>>> cone cells. And now I know that there are people with 4-colour cells.
>>
>> Several years ago I did quite a bit of research into this. The people
>> with four-color (not colour) cones are rare enough to not be
>> considered part of the normal human race. :) HOWEVER, there are
>> people who have rods with some pigment.
>>
>
>
> Chris
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