Like
human retinae, dogs and cats also have rods and cones in their retinae,
only in a different proportion. They have the ability to differentiate
colors, but they have a more muted version of what we see. This is especially
true for dogs, which probably see more shades of gray than all the individual
colors. However, cats are unique, in that they have the ability to concentrate
small amounts of light in their eyes, allowing them to see at night giving
them extraordinary night vision.
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