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Although there are many frame styles, it is dazzling to choose one from them. But after considerating analysis, no more than three basic types are avialable, square, round and oval. It varies according to different face shape. Generally the people with oval faces of can buy all types of frames. While the round face should choose pear-shaped frame or square frame, triangular faces would normally choose to wear round or oval-shaped frame.
Q: A variety of frame materials are offering, which is the best?
A: The frame according to different combinations of materials and processing system can be divided into:
1. Plastic frame: its characteristics as a light, easy processing, room temperature, no deformation, generally the price is lower.
2. Metal Frame: its characteristic is strong, light and beautiful, which is now the most commonly used frame.
3. Mixed frame (plate): a mixture made of metal and plastic, or metal frame robustness, it is also easily processed into a variety of shapes.
4. Drawing Frame: bottomless box with a nylon wire embedded in the bottom of the lens.
5. No Frame: No frame, only accompanied by his nose and the mirror angle, which is very graceful.
Q: What kind of lens are more appropriate?
A: Currently, according to materials used in the lens is divided into:
1. Glass lens: refractive index of stability and good wear resistance, optical performance, stable, but relatively heavy, which can be easily broken.
2. Resin lenses (CR-39): light, safe, light transmission rate, and can not easy to break, but easy to be scratched on its surface.
3.PC lens: high refractive index solid, but easy to be damaged.
Choice should be based on the needs of individuality.
Q: What is the lens coating?
A: The lens surface is multi-layered anti-reflection film increases in order to reduce specular reflection, increasing light transmission rate. And to ensure visual clarity, as well as reduce the red, UV to eyes.
Q: Why should measure and optical IPD?
A: The purpose of measuring Pupil is to enable the lens optical center distance and binocular pupillary distance consistent with the patient to wear comfortable, or will cause the prism effect, the patient will appear as the material fatigue, dizziness, nausea and other symptoms.
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