As a Doctor whether for a human or an animal we always look at the eyes of the patients as they are the best indicators of health.
The cuttlefish has excellent eyesight. When they in deep, dark water, the horizontal pupil in its eye usually opens wide to let in more light. But when the animal is in shallow, bright water, the eye squeezes into the squinty, ripply slit shown here. A giant squid’s eyes are the largest amongst animal species measuring up to 40 cm (16 inches) in diameter.
SPIDER They have four eyes on the face with the enormous pair located in the center, and remaining small eyes are located at the dorsal surface of the cephalo thorax. They have a sharp vision, can see a prey anywhere from 30 to 40 cm away.JUMPING SPIDER Their eyes looking like alien's eyes, have eight eyes and excellent vision.
DOLPHINS sleep with one eye open
SCALLOP A scallop has 35 eyes that are blue in color.
Whenever my friends seek my advise on selecting a puppy or a kitten I always advise them to look at their eyes. If they are abnormally colored either with a blue or green, probably they would be deaf and requries an extra care which is a genetic abnormolity due to an autosomal gene.
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