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.
Fossa Classification and Evolution The Fossa is a medium-sized carnivore that is found exclusively on the island of Madagascar. The Fossa belongs to the Malagasy Carnivores group which are thought to have descended from Mongoose-like ancestors that arrived on Madagascar from Africa up to 24 million years ago.he tail of the Fossa is around the same length as it's body and plays a crucial role in helping the animal to balance whilst it is leaping through the trees. The Fossa has short but dense red to dark brown fur and a small cat-like head and a dog-like snout, with large forward facing eyes and small, rounded ears.