1. How to explain the refractive index? The ratio of the speed of propagation of light in the air to the speed of propagation of light in that lens (N), the higher the refractive index, the thinner the lens. 2, the thickness of the safety center of the lens (international) resin 1, 0MM glass 0, 7MM 3, Abbe with dispersion, the relationship between refractive index The higher the refractive index, the lower the Abbe number, the greater the dispersion 4, what refractive index of glass lenses 1, 523 1, 61 (Zeiss unique) 1, 7 1, 8 1, 9 5, what refractive index of resin lenses 1, 499 1, 56 1, 61 1, 67 1, 701 1, 74 6.What are the processes of resin lenses? Add hardening, add translucent film (green film, amethyst film, diamond gold film), add UV film, add anti-radiation film (EMI), dyeing 7, how to explain polarized lenses to customers? Like blinds, polarized lenses only allow light to pass in a certain direction, so it can filter out part of the stray light, make the light softer, and can reduce glare, so that we see objects more clearly and more real. Especially suitable for fishing and driving 8.50 □18 135 What does it mean? □ is the box representation 50 is the maximum diameter of the frame level 18 is the length of the beam 135 refers to the length of the mirror leg 9, frame CE means what? EU quality system certification 10.What are the advantages of aspheric lenses? (1) less swirl pattern, beautiful appearance (2) realistic image, clearer, less fatigue (3) lighter and more bookish lenses (4) wider field of view 11, what are the characteristics of pure titanium frames? (1) lighter than the general nickel alloy frame 48% (2) corrosion-resistant non-allergic (3) not easy to fade (4) 2900 degrees Celsius temperature welding, very strong and not easy to desoldering 12, what are the natural materials used to make the frame? Tortoiseshell horn wood 14, the existing care solution after the opening of their respective expiration dates? Dr. Leng, BaoShiNing: 4 months, Haichang, Weikang, all natural beauty: three months 15, SCL according to the use cycle can be divided into what kinds? Daily throw, weekly throw, fortnightly throw, monthly throw, seasonal throw, semi-annual throw, long-wear type 16, how to distinguish between the plate frame and plastic injection frame? Plate: (1) nosepiece is glued on (2) cut texture at the leg closure (3) polished texture inside the lens ring (4) color three-dimensional, not fade 17, ZS ten selling points (1) the world’s professional cameras, camcorders use ZS lenses for lenses such as Sony, Suha (2) the first computer calculates the curvature of the lens inside and outside, adhere to a degree, only one of the best curvature combination (3) fine grinding Low error. ZEISS company uses three-dimensional surface grinding technology, precision to ensure the best optical quality, clear vision, image does not distort (4) good visual quality, bright vision range up to 56MM (5) multi-wavelength coating, the softest reflection, reflecting harmful light effect is good (6) Abbe coefficient, low dispersion, imaging quality and stability (7) excellent quality, the high degree of transparency up to 99% (8) high-precision Planetarium and the top body precision detector (such as Mercedes-Benz, BMW) are from Zeiss (9) safe center thickness resin 1.5MM glass 0.8MM (10) world-class brand has a history of 150 years, and by Einstein’s affirmation 18, what kinds of dual light? Flat top double light Dome double light A line of double light Invisible double light 19, plus the characteristics of the film lens? (1) increase light transmission (2) anti-reflective (3) effective blocking of harmful light (4) waterproof and anti-fog 20, what is the difference between MADE IN JAPAN and FROME JAPAN? The former is made in Japan, the latter refers to the brand originated in Japan. 21.Will it hurt my eyes to use contact lenses all year round? As long as the appropriate use and maintenance will not, but if there is discomfort should immediately stop wearing to our store to check 22, contact lenses will cause allergies? Contact lenses themselves do not cause allergies, allergies are caused by the deposits on the lenses, overtime wear, incorrect use of care solutions, individual differences in tear proteins are factors that cause increased deposits 23, wearing contact lenses during the growing age, is it easy to deepen myopia? The deepening of myopia is a physiological change, mainly due to environmental and genetic factors, and the lenses themselves are not directly related 24.Can I wear contact lenses while swimming? No, if you wear contact lenses when swimming, the lenses may be lost in the water; bleaching microorganisms in the water may be adsorbed on the lenses, which will cause damage to the lenses and easily lead to eye damage. 25.What is the effect of excessive protein precipitation? It will block the pores of the lens, resulting in a reduction in air permeability leading to corneal edema; the wearer will feel a distinct sense of foreign body, easy to dry; the wearer is prone to GPC 26, how long can contact lenses be used? This depends on the state of the individual’s eyes and the conditions of use, but for SCLs the life span is about one year. What kind of lenses are considered good? As long as the wearer can wear them comfortably, see clearly, have stable vision and not affect normal eye physiology, they are good lenses. 28.When the eyes are congested, can I continue to wear contact lenses? If you start wearing them, you will have a slight congestion, so don’t worry about it. But if you find that the conjunctival blood vessels have increased or there are new blood vessels in the cornea after wearing them for a long time, you must stop wearing them immediately and seek medical examination. 29.Will the contact lens fall out of my eye? There is no problem with normal wear, but be careful not to rub your eyes and prevent other things from rubbing into your eyes. 30.What happens when I wear contact lenses with tears? If you wear soft contact lenses, you may have dirty or broken lenses, or you may have inflammation in your eyes. If you exclude the lens problem, you should go to our company to check. 31.Will the contact lens slide on the eyeball? This is a normal phenomenon, because the lens slides in order to make the lens and the cornea between the tears can be circulated to supply oxygen; but if the slide is too strong, it will affect the wearing vision. 32.Why can’t I see clearly occasionally? (1) It may be caused by wearing too tight or too loose (2) It may be worn overtime (3) The deterioration is caused by protein precipitation. 33. What happens if there are chips in the lens? It will cause foreign body sensation, pain, and congestion, so be sure to stop wearing them. 34.Will soft contact lenses break? If handled in the right way, they should not break, but if they touch nails or other sharp objects, they will easily break; of course, this will vary depending on the material. 35.What are the basic production processes of contact lenses? What are the respective applications? Rotational molding (centrifugal casting method); molding; turning molding; mixing process 36, contact lens wearing comfort or not depends on which factors? The softer the material, the higher the water content, the thinner the thickness the more comfortable to wear; choose the right base arc is also one of the factors of comfort. 37, contact lens cleaning should pay attention to what issues? (1) ask the customer the lens wearing time (2) confirm the lens for what brand and series, color lenses and discard type will not be cleaned (3) check whether the lens is broken, staining, sediment condition (4) leave customer information, confirm to pick up the time 38, slit lamp magnifier and) the use of curvature meter The former is to check the main physiological state of the eye whether you can wear contact lenses; the latter is used to measure the corneal The latter is used to measure the curvature parameters of the cornea to determine which customer is suitable for wearing 39, contact lens disinfection what methods? (1) thermal disinfection method (2) chemical disinfection method (3) hydrogen peroxide disinfection method 40, contact lens re-examination process? ( 1) ask the customer wearing situation: comfort, clarity, operation (2) test wearing vision computerized optometry test to understand the residual degree (3) slit lamp inspection lens and eye condition to understand the fit: tightness, central positioning, corneal coverage, sliding degree, sagging degree (4) for the customer’s problems, strengthen the guidance processing and maintenance methods and note