1. Keratoplasty lenses are classified as Class III medical devices and need to be purchased from regular hospitals, so how can hospitals advertise like crazy? Besides, any kind of things have a let everyone understand the familiar process, ten or twenty years ago we do not understand the laser myopia surgery ah. Moreover, keratoplasty lenses have a certain adaptive population, age between 7-50 years old, eye without any disease; curvature between 40D-46D; myopia below 600 degrees, astigmatism below 100 degrees can be considered for fitting, and also need to try on, not all myopic people are suitable, so you just know that! This kind of thing is not surprising.
2. There are many brands of keratoconus lenses, different types imported from different countries, and there are differences in comfort and oxygen permeability. The doctor will give you a trial run if you try them on and make sure they're acceptable, and then the hospital will send your eye information to the factory to customize them for you.