First, it is best to undergo an ophthalmic examination at a reputable hospital before getting glasses. This is because some students' declining vision may not be caused by myopia or myopic astigmatism, but rather by certain eye diseases. Therefore, a comprehensive eye exam before refraction is essential to distinguish between true and false myopia.Avoid choosing based solely on cost or convenience. Verify that the eyewear provider holds a valid eyewear production license; ensure their refraction equipment and testing instruments bear certification marks; confirm that optometrists and technicians are licensed; and check that the eyewear carries proper certification labels. These "four certifications" are fundamental to ensuring quality eyewear.Follow your doctor's instructions, including dilated eye exams when necessary—especially for minors and first-time wearers. Request a copy of your prescription after the exam. Since vision can be affected by mood or physical condition, schedule two exams within days to ensure accurate results.
Fourth, pay attention to material selection. Lenses typically come in plastic, glass, or crystal varieties, with both lenses and frames carrying expiration dates.If imported materials are used for lenses, frames, or mounts, an import inspection certificate should be provided. Acrylic lenses are popular among students due to their lightweight properties, but they require higher maintenance standards. Exposure to temperatures exceeding 60°C can cause damage due to differing expansion rates between layers, leading to blurred vision. Their scratch resistance is also significantly lower than that of glass lenses, so consumers should take care to protect the lenses during daily wear.
Fifth, after purchasing eyewear, request documentation from the retailer including the prescription processing form, invoice, and after-sales service commitment. This safeguards your rights should issues arise. If discomfort persists beyond one week of wear, consult an ophthalmologist or professional promptly.