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.
Anatomy of the Eye and Visual System. 1) The eye functions by the bringing light to the retina in order to form an image. 2) This light is transmitted and focused on the retina by the cornea. 3) Directly behind the cornea, is the iris. The iris contains muscles which open/close the pupil in response to the brightness of light.