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, the fossa was thought to be a member of the cat family because of its feline appearance.However, it is now considered to be a member of the mongoose family and is closely related to the hyena family. Fossas are extremely shy and often flee from human contact.ntil recently, the fossa was thought to be a member of the cat family because of its feline appearance.