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With the development of prescription glasses, more and more different designed eyeglass frames have become available. Normally, frames can be divided into three different types - full rim, semi rim and rimless. Many people may ask about which frame type is better when they prepare to buy the prescription glasses at retail stores or online stores. Actually, each frame type has its own features.
Full rim eyeglasses, also called "hide-a-bevel" eyeglasses. They are not only the most original eyeglasses but also the most common and used designs. They encircle the prescription lenses completely; can hold the lenses tightest, and also available for the thinnest prescription lenses. The full rim eyeglasses frames do a good job of avoiding the edges of the lenses exposed; they are the good choice for people who have strong prescriptions.
Semi rim eyeglasses frames, also known as "grooved" frames, only cover half the prescription lenses. There are nylon strings or liners running along the bottom of the prescription lenses to hold the lenses, so the semi rim frames are lighter than full rim frames. For these frames, when we assemble the prescription glasses, we need to cut grooves into the prescription lenses edges. For this reason, the thicker lenses are required for the semi rim eyeglass frames in order to not chip and crack.
Rimless eyeglass, as the name implies, have no rim. The lenses are joined by the nose bridge and the temples are joined to the lenses on the other ends. The rimless rim eyeglass are the lightest eyewear. They are timeless as they are very simple, and make you look confident and versatile. But due to there is no rim surrounding the lenses providing sufficient protection, they are least durable. Additional, the rimless eyeglass frame put very high amount of stress on the prescription lenses, so it is recommended that CR39 lenses should be avoided to use, and high index lenses with better durability are recommended such as polycarbonate lenses.