RE: diagram of a deer's eye
BTW.....a deer's eye doens't lack rods and cones...it would be blind ! Rods are more sensitive to light but do not register color..Cones pick up the color.A deer has many more rods than it does cones.Deer do not see only black and white,but have dichromatic vision,that is they can see yellow and blue,but are red-green colorblind,these appear as shades of grey.Some research also shows they may be able to pick-up some of the UV spectrum.So you would have to make sure your light doesn't emit anything the deer could see.