Definition and structure of glasses
?Basic definition?: Glasses correct vision problems (such as myopia, hyperopia, astigmatism, etc.) through the optical principle of lenses, and also have decorative functions. They are composed of lenses (optical core) and frames (supporting structures), and the materials include resin, metal, plastic, etc.
?Historical development?: The prototype of crystal lenses appeared in the Eastern Han Dynasty, and the prototype of Western glasses originated from Italy in the 13th century. Benjamin Franklin invented bifocal glasses in 1784, and contact lenses came out in 1888.
Classification and function of glasses
?Correction category?: Including myopia glasses, hyperopia glasses, astigmatism glasses, reading glasses, etc., designed for different refractive problems.
?Protection category?:
?Daily protection?: Sunglasses (UV protection), computer goggles (blue light protection), sports goggles (impact protection).
?Special uses?: 3D glasses, night vision goggles, driving goggles, etc.
Key points for fitting glasses
Key points for optometry (avoiding wrong methods)
?Don’t do optometry at random?: You need to choose a professional ophthalmology hospital, optometry center or authoritative optical store to ensure that the equipment is advanced and the optometrist is certified.
?Avoid using only computer optometry data?: It must be combined with subjective optometry (such as inserting and trial wearing) to adjust the prescription according to eye habits and adjustment ability.
?Keep your eyes in good condition?: Avoid staying up late or excessive fatigue before optometry, otherwise it will affect the accuracy of the data.
