They fit into an alignment fixture that allows you to alignt the headlights.
No, they are part of the headlight assembly.
if its on the out side in most cases it is they sell a cleaning kit at the parts store that works good
Your local auto parts store can sell you a kit to restore the plastic lenses of your headlights. Just be patient and follow directions.
Your local auto parts store should have a kit available to restore the clear plastic lenses over your headlamps.
Check with your local auto parts store, they have kits available that help you restore the faded/cloudy headlight lenses.
hammer
There's a product made by Maguire's called Plastix that will remove any scratches on the instrument panel lenses. I use it on my 03 Limited 4runner, including the headlight and tailight lenses. Cheers,
The first plastic spectacle lenses were developed by Columbia Resins in the 1940s, made from a plastic called CR-39. While Columbia Resins is credited with creating the first plastic lenses, it is important to note that the development of plastic lenses was a cumulative effort involving several researchers and innovators in the field of eyewear.
The dealer, EBAY, do a google search..... they are used for roads
Plastic ophthalmic focus lenses accounted for approximately 18.3 percent of the industry's shipments
Plastic
Fredrick Douglass