Contrast between hospitals and eyeglasses stores: different optometry standards, different optometry equipment, different prescription processes, and prescription advantages.
1, the different standards of optometry
Opticians: directly based on the refractive error of the computerized optometry.
Hospital: testing naked eye vision, preliminary computerized optometry, pupil dilation, pupil dilation after computerized optometry, comprehensive optometry (can distinguish between true and false myopia, and strabismus, amblyopia and other eye diseases).
2, optometry equipment is different
Opticians: optometry through the visual acuity meter, computerized optometry, comprehensive optometry.
Hospital: optometry through the visual acuity meter, computerized optometry, comprehensive optometry, intraocular pressure examination, etc., the equipment is more complete.
3, prescription process is different
Opticians: ordinary optometry ordinary optometry steps are divided into measurement of naked eye vision, computerized optometry, lens box test method, prescription, simple operation.
Hospital: medical optometry is not a direct optometry, but first to do eye-related examination, to exclude eye disease.
4, dispensing advantages
General optometry: general optometry is simple and fast.
Medical optometry: Medical optometry has a high degree of precision, more accurate measurement of astigmatism axis and degree, and more comfortable to wear.
Common lens materials
1, resin lenses
Resin lenses are lighter than glass lenses, and more impact resistant. They can be divided into two types: spherical resin lenses and aspherical resin lenses. With traditional spherical lenses, there is a distortion around the lens to see objects, limiting the wearer's field of vision.
In the era of continuous technological progress, aspheric lenses are designed to broaden the field of vision, make the object clear and comfortable, restore the original true color, and meet the visual needs of consumers. Resin lenses are favored by consumers for their UV protection, radiation protection, lightness and high security, and almost monopolize the market.
2, PC lenses
The market is also called the space lens. It is characterized by light weight, strong impact resistance, more resistant to impact than resin lenses. It is about one-tenth the weight of glass and only half the weight of traditional resin lenses.
Reference: Baidu Encyclopedia - Dispensing glasses