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.
Irritability can feel like emotional sandpaper under your skin and once it is in full swing, everything, from a partnerâs kind words to your dogâs whine, seems to make it worse. Typically when we think of depression, we think of the classic symptoms: sadness, low energy, insomnia, appetite changes, and so on. Sometimes, however, depression presents with a slightly different constellation of symptoms, especially in children and young adults.