Tire placard pressure is often much lower than listed on the tire sidewall. Air pressure given by the vehicle maker was based on the tires supplied with the vehicle. They design many newer replacement tires to give a good ride, with much more pressure.
Fresnel lens. A Fresnel lens is a type of lens invented by Augustin-Jean Fresnel. Originally developed for lighthouses, the design enables the construction of lenses of large size and short focal length without the weight and volume of material which would be required in a lens of conventional design. Detailed information.
Credit: liz west CC-BY-2.0. The early handheld visual aid was found in the ancient ruins then known as Nineveh, and it has no known inventor. Eyeglasses came into greater fashion around 1752 when James Ayscough invented eyeglasses with hinged earpieces and tinted lenses, much like modern sunglasses.