Best Answer: The pupil size limits the the amount of light that enters the eye. There are also day-time photoreceptors, the cones, which occur with three kinds of photo-sensitive pigments, for red, yellow-green, and blue.
Those âdevotedâ dogs lying on their mastersâ graves? Theyâre depressed. âMany dogs are simply depressed for their whole lives because theyâre deprived of the normal amount of attention, exercise, and stimulation they need from day one. These humans wonât know they have a problem and wonât want the dog any livelier as that wouldnât fit in with their lifestyle,â says Tamara.
A pet can remind you that you're not alone, says Desiree Wiercyski, a life coach in Fort Wayne, IN. Pets offer unconditional love, which can be extraordinarily soothing when feeling isolated. Wiercyski, who also lives with depression, says her dog helps her shake off feelings of worthlessness.