Eyeshine and Red-eye Effect
In flash photographs, odd-eyed cats typically show a red-eye effect in the blue eye, but not in the other eye. This is due to the combined effect of the (normal) presence of a tapetum lucidum in both eyes and the absence of melanin in the blue eye. The tapetum lucidum produces eyeshine in both eyes, but in the non-blue eye a layer of melanin over the tapetum lucidum selectively removes some colors of light.
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Famous quotes containing the word effect:
“The pleasure of one’s effect on other people still exists in age—what’s called making a hit. But the hit is much rarer and made of different stuff.”
—Enid Bagnold (1889–1981)