Is the glasses of corrective vision useful

 When the eye is relaxed and parallel light rays enter the eye, refraction occurs Round Tortoise Shell Glasses. If the focus does not converge into the fovea, refractive errors occur. Refractive errors are classified as nearsightedness, hyperopia and astigmatism. After pupil dilation, if the patient's visual acuity is still not restored to the normal 1.0, the patient has true myopia, and it is recommended to wear Tortoiseshell Glasses Frames to correct the visual acuity. For children if long time don't wear Light Tortoise Shell Glasses, corrected vision has not restored to normal levels, will give the patient's visual development brings the serious influence, serious still can form amblyopia, amblyopia patients for treatment of the golden age, before the age of 9 age after missed the visual development, even wearing Tortoiseshell Glasses, is also not correct to normal peers children's visual acuity level.

What are the materials of glasses

 Tortoiseshell Glasses are mainly made of the following materials: 1. Light Tortoise Shell Glasses lenses are characterized by high definition and high hardness. Their disadvantages are easy to break and heavy. 2, PC lens is polycarbonate, is thermoplastic material, the advantage is relatively light, but also relatively safe, suitable for rimless Tortoise Shell Glasses. The disadvantage is that processing is more difficult, the surface is easy to scratch, thermal stability is not very good. Generally applicable to the production of sunglasses, that is, flat lens Women's Prescription Sunglasses. 3. Resin lenses are most commonly used at present and are of high quality. The advantage is relatively light, impact resistance, not easy to break, at the same time the uv absorption is better than the glass lens, but also can add anti-uv elements. The disadvantage is not wear-resistant, easy to scratch. 4, natural lenses are now used less, such as the advantage of quartz production is large hardness, wear resistance, the disadvantage is that can not fully absorb ultraviolet and infrared. If you match glasses, it is better to use resin lenses, which are also widely used materials at present.

Tortoiseshell glasses frame what benefits

 Hawksbill turtle is the only turtle on earth can digest Light Tortoise Shell Glasses material, important food is sponge, sponge contains a lot of silica, and the chemical composition of glass is the same, this is a good explanation of tortoiseshell plate magic translucent grain. Tortoiseshell Glasses rich in color, black, black, brown, light gold, a variety of color interspersed transformation, black spots scattered distribution, the overall color is dark, both men and women, to the wearer add a noble and stable.

Hawksbill lit with burning in the hair, the physical structure of tortoise shell and nails and hair very close, and the skin is the "blood relationship" friends recently, so at the time of sweat, will not slide easily, will not cause allergies, traditional metal glass and plastic lenses do have a lot of allergies, Tortoise Shell Glasses can solve this problem very well.

Tortoiseshell texture hard and full of toughness, the frame bending 45 degrees will not break, good physical properties can keep the frame perennial deformation, and tortoiseshell wonderful lines will never fade, time goes by, beautiful permanent, so every piece of Real Tortoise Shell Glasses crafts can be handed down from generation to generation heirloom!