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.
Each fossae accommodates a different part of the brain. The middle cranial fossa is located, as its name suggests, centrally in the cranial floor. It is said to be âbutterfly shapedâ, with a middle part accommodating the pituitary gland and two lateral parts accommodating the temporal lobes of the brain. The hypophysial fossa or pituitary fossa (seat of the saddle) sits in the middle of the sella trucica. 2  It is a depression in the body of the sphenoid, which holds the pituitary gland. 3  The dorsum sellae (back of the saddle) forms the posterior wall of the sella turcica.