In general, optical or optical technology refers to anything that relates to light or vision, whether it be visible light or infrared light that performs a specific function. ... Optical storage devices use optical technology to save and retrieve data on discs, like a Blu-ray, CD, DVD. Therefore opical technology is a very wage topic to be discussed, lets narrow it to only the mirrors and lenses.
if we talk in scientific terms mirrors and lenses are made of sand which is boiled, when the sand is boiled it produces harmful gases which impact the environment and breathing the air from the enviornment impacts everyone, all living being and therefore it impacts all of us.