A pair of qualified glasses can brighten people's eyes, and unqualified or poor quality glasses can make people feel dizzy, nauseous and uncomfortable. Selecting a pair of qualified glasses is the wish of consumers. Here, briefly explain how to purchase eyeglasses. Spectacle lenses and spectacle frames are only semi-finished products and must go through multiple processes before they can become the final product—fitting glasses.
First, consumers should choose to obtain the production license of industrial products issued by the quality supervision department, and have a certain size, a certain degree of technical power of optical shops. The optical shop must have a special optometrist, optician, a dark room type optometry room, and equipped with necessary measuring instruments such as an optometry lens box, a coke meter, a curvature meter, etc., and be qualified for metrological verification, and be valid for a period of time. Inside, there should also be the necessary frame shaping equipment.
Second, choose frames. Frames can be classified into metal frames, racks, hybrid racks, or full frames, half frames, and no frames according to different classification methods. Half frame, no frame lighter weight, lighter pressure. Some metal frame plating is too thin and can cause skin irritation. Consumers should choose according to their actual conditions.
Select frames in the aesthetic focus, but also pay attention to the interpupillary distance (the distance between the pupils in the two heads of the eye) to be consistent with the frame, not for the sake of beauty and choose not suitable for their own frames.
Third, choose the lens. Lens materials can be divided into ordinary glass, optical glass, high refractive index glass and resin lenses. The latter two are lighter, and resin lenses can be about 50% lighter than high-index glass lenses. The optical glass lens has high transmittance and clear imaging, and is suitable for adolescents to match. However, if the refractive power is large, the lens will be very thick, and high refractive index lenses should be selected at this time. For consumers who like to exercise, they should choose resin lenses. Their toughness is better and they are not easy to damage. As for whether the lens is coated, it can be selected according to individual needs. Lens, frame selection is good, to be optometry. Optometry is an important part of the process. The commonly used optometry methods include dilated refraction and optometry. Irrespective of which method is used (especially if the result of refraction using a computer refractometer can only be reference data), the optical verification lens must be used for insert verification (usually the degree after insertion is lower than the degree of the computer refractometer), Subjectively feel comfortable, no dizziness and other discomfort, see the visual acuity of up to 1.2 or so is appropriate. Finally, measuring the pupil distance, and fill in the optometry, axis, and other parameters, you can do the glasses.
Fourth, glasses acceptance. Contents include: whether the glasses provided by the merchant are the materials you require, whether the two lenses are of the same color, and whether the parameters such as diopter are the same as those of the optometry sheet. Observe the inside and surface of the lens with the naked eye and a magnifying glass. Finally, be sure to mark the optical center so that both the pupil distance and the optical center shift (ie, the shift between the optical center of the lens and the geometric center of the frame) are acceptable. Check that the lens is securely attached and that the frame is deformed. Ask the optician to adjust the temples until it is properly fitted. Wear glasses and go for a walk. Look at the distance and see the near place. There can be no obvious discomfort. After everything feels better, let the merchant issue a quality inspection report on your glasses, ask for an invoice, and save together with the optometry. If you find quality problems, you can ask the business to handle it or complain to the quality and technical supervision department.
This information comes from China Glasses Trading Network:, Contact Phone
