The rental agencies determine the rules for that. Most rental companies will not rent to anyone under the age of 25. Some will rent to people 21 to 24 years old, but charge a premium rate. The only time I have ever heard of a rental car company renting to an 18-year old is to a member of the military.
1 The lens is a soft, transparent, spherical structure that is suspended within the eye, just behind the pupil. 2  The lens is responsible for focusing light coming in through the pupil onto the retina in the back of the eye.
Pupillary light reflex - Terminology. 1  Pupil is the dark circular opening in the center of the iris and is where light enters the eye. 2  Left direct pupillary reflex is the left pupil's response to light entering the left eye. 3  Left consensual pupillary reflex is the left pupil's indirect response to light entering the right eye, the contralateral eye.