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Are darker sunglasses better for your eyes
The color depth of sunglasses and eye protection ability is not a simple positive correlation, the following is the specific analysis: Sun glasses color action principle The color of sunglasses is mainly through the absorption and reflection of different wavelengths of light to achieve a specific...Read more -
What problems do children need to pay attention to when wearing sunglasses?
Choose the right product Uv protection function: UV damage to children’s eyes is greater, to choose sunglasses that can effectively block UV, the label is usually marked with UV400 and other signs, indicating that it can block more than 99% of UV. For example, in the strong sunshine of the ...Read more -
Which materials are more durable?
Product characteristic class The principle and application of polarized sunglasses: mainly involves how the polarized lens filters the light in a specific direction, reduces glare, and the practical application effect in different scenes such as driving, fishing, skiing, etc. Discoloration mechan...Read more -
How to wear sunglasses correctly for optimal sun protection?
Choose the right sunglasses Uv protection: To ensure that sunglasses can effectively block ultraviolet light, the label is usually marked with UV400 and other signs, indicating that it can block more than 99% of ultraviolet light, should be preferred such products. Transmittance level: Select the...Read more -
How to judge the quality of sunglasses?
eyeglass Optical property Clarity: Quality sunglasses lenses at any Angle to see the object should be clear, no deformation, no double shadow. You can rotate the lens slightly by observing distant linear objects, such as the outline of a building, a telephone pole, etc. If the line of the object ...Read more -
How to judge the quality of spectacle frames?
Material aspect Look at the material composition: high-quality metal spectacle frames often use titanium alloy, pure titanium, etc., with light weight, high strength, corrosion resistance, anti-allergy and other characteristics; Plastic material is cellulose acetate as the best, good texture, not...Read more -
How to choose the right frame for your glasses?
Consider face shape Round face: suitable for square or rectangular eyeglass frames, so that you can use straight lines to neutralize the roundness of the face, increase the three-dimensional sense of the face and the sense of line, such as a narrow rectangular metal frame is very suitable. Avoid ...Read more -
What are the materials of eyeglass frames more durable?
Metal material Titanium alloy Features: It has the advantages of light weight, high strength, corrosion resistance, not easy to deformation, and small irritation to the skin, suitable for long-term wear. Pure titanium frames can withstand greater external forces without deformation, memory titani...Read more -
What kind of frames are popular?
Metal material peculiarity Titanium alloy: with light weight, high strength, corrosion resistance, no allergic reaction and other advantages, is a common material for high-end spectacle frames. It can be made of a variety of fine, stylish styles, very comfortable to wear, especially for people se...Read more -
Which face shapes are suitable for different frames?
Metal material Round face: suitable for square or rectangular metal eyeglass frames, such as pure titanium square frames. Its hard lines can neutralize the roundness of the round face, making the face look more three-dimensional. Square face: Round or oval metal glasses frame is more suitable, li...Read more -
Can myopia not wear glasses?
In the discussion “Can nearsighted people not wear glasses?” On this topic, we first need to clarify the definition of myopia, the causes and the role of glasses in correcting vision, and then in-depth analysis in different situations, whether patients with myopia may choose not to we...Read more -
What is the optical refractive index of an eye lens?
In the discussion of “What is the optical refractive index of an eye lens?” When it comes to this problem, we first need to understand the physical concept of optical refractive index, and then further dive into the specific application of eye lenses to analyze the optical refractive ...Read more