What different pupil shapes mean?

There is a striking correlation between terrestrial species’ pupil shape and ecological niche (that is, foraging mode and time of day they are active). Species with horizontally elongated pupils are very likely to be prey and to have laterally placed eyes.

What causes odd shaped pupils?

Causes of abnormal pupillary shape include: Congenital defects (eg, coloboma). Iridocyclitis. Iris trauma.

How do animals with slit pupils see?

Species with pupils that are vertical slits are more likely to be predators that are active both day and night. The scientists found that the horizontal pupils expanded the effective field of view. When stretched horizontally, the pupils are aligned with the ground, getting more light in from the front, back and sides.

What is it called when a pupil is not round?

Overview. Anisocoria is a condition in which the pupil of one eye differs in size from the pupil of the other eye. Yourpupils are the black circles in the center of your eyes. They are usually the same size.

What causes pupils to shrink to a pinpoint size?

However, some medical conditions and the use of certain drugs can cause the pupils to shrink to a pinpoint size. The medical term for pinpoint pupils is miosis or myosis, from an ancient Greek word muein, meaning “to close the eyes.”

What are the different types of eye shapes?

There are multiple different eye shapes, such as hooded eyes, downturned eyes, and upturned eyes, among many others.

Why are the pupils of my eyes so big?

The difference between the pupil sizes is more or less constant, even when the light changes, and is not usually of concern. Mechanical anisocoria: This type of anisocoria is the result of physical damage to the eye, such as an injury or a condition that causes inflammation to the eye.

Why do my pupils have a keyhole shape?

Colobomas are most common in the bottom half of the iris, giving the pupil a characteristic keyhole shape. Colobomas are congenital, meaning they are present from birth, and are due to the baby’s eyes not developing properly during pregnancy.