Therefore, when choosing cheap eyeglasses near me lenses, if the degree is high, the lightweight effect can be prioritized, and lenses with higher refractive index can be selected to ensure imaging quality and clarity.

If the degree is low, you can pair it with a slightly higher Abbe number. After all, good visual effects are the key to seeing things. So don't blindly pursue the thinnest edge. The Abbe number is the key to human eye health, comfort, and clarity.

When the Abbe number is too low, it can cause harm to the human eye, but it cannot be detected in the short term. For some sensitive people, they can clearly see the color sensation at the edge of the object.

In addition, for lenses with the same two parameters, choosing a smaller frame results in a thinner thickness at the edge of the lens. Is there a standard for selecting lens materials? No, the cheap eyeglasses near me selection is also based on demand and budget.

The materials of lenses mainly include glass and resin, among which resin materials are further divided into thermoplastic materials and thermosetting materials. For lenses, everyone's choices are relatively uniform.

In recent years, with the improvement of resin lenses, most people choose thermosetting resin lenses. Thermosetting material lenses have relatively balanced performance in all aspects.

The higher the degree of an ordinary spherical mirror at the edge, the more distorted the imaging will become. Non-spherical lenses correct aberrations, and the degree at each position is equal, making what is seen more realistic and natural.

Under the same specifications, non-spherical lenses look thinner and lighter, making the rearview more realistic, the field of view clearer, and the eyes more natural and comfortable when worn.