Nearly everyone who has cataract surgery will be given an artificial lens called an intraocular lens (IOL). These lenses improve your vision by focusing light on the back of your eye. You won't be able to see or feel the lens. It requires no care and becomes a permanent part of your eye.
Quora User, Driving since 1995. Gas is always on the right, brake is in the left in an automatic and the Middle in a manual. The brake is always the next peddle to the left of the gas.
Engine brakes are used in heavy duty and commercial vehicles -- like semitrailers and buses -- to increase speed control. Engine brakes are commonly known as Jake brakes because the largest manufacturer is Jacobs Vehicle Systems [source: Jacobs Vehicle Systems ]. Braking causes friction, which in turn causes heat. (Read How Brakes Work to get a better understanding of the process.) Too much heat, like what is produced when a big rig tries to maintain speed and control on steep downhill grades, can cause brakes to overheat and fail.