Eye dilation from eye drops used for examination of the eye usually lasts from 4 to 24 hours, depending upon the strength of the drop and upon the individual patient.
Fossa. Fossas are the largest carnivores in Madagascar. Secretive and cat-like, these predators are well equipped for chasing down lemurs in the forest. They are famed for having some strange development, courtship and breeding traits. As they grow, female fossas go through a period of 'masculinisation' during which their genitals resemble those of a male. Breeding takes place in the autumn when a female attracts a large number of males.
Until recently, scientists had mistaken the puma-like fossa for a primitive kind of cat. Size relative to a 6-ft (2-m) man: A relative of the mongoose, the fossa is unique to the forests of Madagascar, an African island in the Indian Ocean.Growing up to 6 feet (1.8 meters) long from nose to tail tip, and weighing up to 26 pounds (12 kilograms), the fossa is a slender-bodied catlike creature with little resemblance to its mongoose cousins.adagascar is home to an enormous variety of plant and animal life, and a number of species are unique to the islandâincluding over 30 species of lemur, the fossaâs prey of choice.