The extraocular muscles must turn each eye inward; the sphincter muscles must work to make the pupil smaller; and the ciliary muscles must contract to allow the lens to change to a shape that will produce a clearer image. Solution: Focus on a distant object to immediately feel your eyes relax.
Its upper body is blue, the belly is silver, and the fins are yellowish-gray. The common amberjack can reach five to six feet (1.5 to 1.8 m) in length and more than 100 pounds (45 kg) in weight. The average weight, however, is 10 to 15 pounds (4.5 to 6.8 kg).
Females are generally larger than  males. They can weigh an average of around 700 to 1100 kilograms  (1500 to 2400 pounds). Giant great whites of weights upto 2200  kilograms (5000 pounds) have been caught by fishermen.   Adults great whites are on an average between 4 to 5 meters (13 to  17 feet) in length.