miosis (constriction of the pupils) or mydriasis (dilated pupils);

Vertical pupils – Non-poisonous snakes have round pupils.

This type of pupil is called as the Argyll Robertson pupil.

Vertical pupils – Non-poisonous snakes have round pupils.

miosis (constriction of the pupils) or mydriasis (dilated pupils);

The diffractive optical element generates multiple exit pupils (304-316), while the other embodiments generate enlarged exit pupils.

Sheep have horizontal pupils, which gives them an excellent peripheral vision.

Dilated pupils are pupils that are larger than normal in size.

Sheep have rectangular pupils which gives them excellent peripheral vision.

They have a horizontal slit-shaped pupils which allows them to have an excellent peripheral vision.

Sheep have horizontal slit-shaped pupils, possessing excellent peripheral vision

Sheep have horizontal slit-shaped pupils, possessing excellent peripheral vision.

These animals have horizontal slit-shaped pupils, with excellent peripheral vision.

Corresponding partial zones of the detector are associated to the aperture plates.

Other times the round pupils of the reptilian hybrid will momentarily shift to vertical pupils.