I have worn contact lenses for a long time due to near sightenness. They are lenses placed directly on the eye.
Oh!  Are they really helpful for your vision and better than glasses?
They provide a clearer vision than glasses, especially with regards to peripheral vision.
That sounds like a great benefit!  Are the comfortable enough to not realize they are in your eyes?
I believe so.  They work for a lot of people.  Over 125 million people worldwide wear them.
Wow!  I would never have guessed that many people wore them!  When were contacts invented?
contact lenses typically provide better peripheral vision, and do not collect moisture (from rain, snow, condensation etc.) or perspiration. This can make them preferable for sports and other outdoor activities. Contact lens wearers can also wear sunglasses, goggles, or other eyewear of their choice without having to fit them with prescription lenses or worry about compatibility with glasses. Additionally, there are conditions such as keratoconus and aniseikonia that are typically corrected better with contact lenses than with glasses.
History.
History Origins and first functional prototypes
Lensless glasses
Lensless glasses are glasses that lack lenses. They are worn solely for aesthetic or fashion purposes, having no function in vision correction or eye protection. The frames are usually oversized, and commonly all black in color. They may be worn in conjunction with contact lenses. Advantages of lensless glasses are that they do not fog or reflect, and there is no lens that will touch long eyelashes and eyelash extensions.
Lensless glasses first became popular in Japan in the 1990s. The trend died out, but has