Accurate optometry examination
It is recommended to visit a professional ophthalmology institution or optometry center, where an optometrist will conduct a detailed eye examination, including the degree of myopia/ hyperopia, astigmatism axis, interpupillary distance, pupillary height, and visual function tests. Avoid relying solely on machine-printed eye chart results for lens fitting, and ensure the data is accurate.
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Size adjustment: Select the frame based on the interpupillary distance. The width of the frame ring plus the width of the nose bridge should be close to the interpupillary distance, with a deviation of no more than 3-5mm. For those with high myopia, small frame glasses are recommended to reduce the thickness and weight of the lenses.
Material selection: Titanium alloy frames are lightweight, comfortable, and less likely to cause allergies; plastic frames have various styles and good stability; metal frames are relatively cheaper but may cause allergies.
Style and face shape: Long faces are suitable for wide-rimmed large frames, round faces are suitable for narrow-rimmed rectangular or pear-shaped frames, but this should be combined with actual trial wear experience.
Selecting lenses
Refractive index: Choose the appropriate refractive index based on the degree. For degrees below 300, select 1.56; for degrees above 600, select 1.67 or 1.74. Avoid blindly pursuing high refractive index which may lead to a decline in visual quality.
Functional requirements: For prolonged eye use, you can choose anti-blue light lenses; for outdoor activities, you can choose color-changing lenses or polarized lenses; for teenagers, you can consider myopia prevention lenses (such as peripheral defocus design).
Spherical/non-spherical: For those with a refractive error of over 200 degrees or astigmatism, non-spherical lenses can reduce image distortion and improve visual clarity.
Processing and After-sales Service
Make sure that the optical center of the lens is aligned with the pupil, and the angle of the frame is symmetrical, with no light leakage or deformation.
Choose a merchant with a return and exchange policy, keep the optometry report and the anti-counterfeiting code, which will facilitate post-sale rights protection.
Warm reminder: It is recommended to complete the lens fitting offline to avoid size mismatch, lens quality problems and售后 difficulties caused by online fitting. If you have any questions about the lens function or material, you can consult a professional optometrist and choose the most suitable product based on your individual eye usage habits and needs.