There are many ways to coat the lens surface, it can make your lens look more attractive, and it can also improve the light transmission of the lens.
Abrasion coating treatment: This hard coating treatment method can make the optical lens more durable. The inner and outer surfaces of the lens must be hardened to be more resistant to abrasion.
Anti-Reflection Coatings (aka Composite Coatings): This coating removes unwanted reflections from your lenses, giving you clear vision, and it also makes you appear more beautiful because others are directly seeing you eyes instead of that pesky reflected light.
Diamond Crystal: This is a new comprehensive treatment method, which provides a good coating combination, which has the effect of anti-wear, easy cleaning of optical lenses and reduction of reflected light.
You should tell your eye care professional (or fitter) about your hobbies, occupation, taste, etc., as long as the above points are combined, they can determine which type of lens material will provide you with a comfortable feeling and clear vision.
Glass lenses: Glass lenses are very wear-resistant lenses, but optical lenses are heavy and easily broken, so they are not suitable for elementary school students and people who often spend time outdoors.
High-refractive-index lenses: Recommended for patients with deeper luminosity, high-refractive-index optical lenses are lighter and thinner than standard lenses, but the weight of high-refractive-index glass sheets will not be greatly reduced, only a little.