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.
The fossa is the largest carnivore in Madagascar and superficially resembles an elongate cat in appearance . The tail is almost as long as the slender, muscular body, and the fossa's coat is short and reddish-brown in colour . The head is fairly small, with a short muzzle and prominent ears . Unlike other members of the Viverridae family, the fossa walks on the soles of its feet; a method of locomotion known as 'plantigrade'. The short, retractable claws also enable efficient tree climbing .