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
When the going gets weird, the weird turn pro
- Hunter S. Thompson
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