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.
Marooned on Madagascar for millions of years, the fossa became the largest native carnivore and dominated the island. Today, fossas are classified as a vulnerable species, with only about 2,500 in the wild. As one of the island's top predators, fossas do not have natural enemies.arooned on Madagascar for millions of years, the fossa became the largest native carnivore and dominated the island. Today, fossas are classified as a vulnerable species, with only about 2,500 in the wild. As one of the island's top predators, fossas do not have natural enemies.