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Is wearing contact lenses harmful to your eyes?
Wear properly and care for the condition Breathability and corneal health: Modern contact lens materials in breathability and other aspects have been greatly improved, as long as the choice of qualified quality, good oxygen permeability products, wear time is reasonable, generally will not have a...Read more -
How to determine whether the optical glasses are suitable?
Feel with the eye Clarity: After wearing glasses, under the normal eye distance, such as looking at an eye chart at 5 meters or a book or computer screen at 30-40 centimeters, you should be able to clearly see the target content, without obvious blurring, ghosting or halo phenomenon. If the dista...Read more -
Whether optical glasses can relieve eye fatigue
Optical glasses can alleviate visual fatigue to a certain extent, the following is a specific analysis from the perspective of different types of optical glasses: Corrective optical glasses Principle: For people with myopia, farsightedness, astigmatism and other refractive errors, wearing the rig...Read more -
Can long-term wearing optical glasses cause damage to the eyes
How to wear the right glasses correctly Correct vision and protect the eyes: for people with refractive errors (such as myopia, farsightedness, astigmatism), long-term wear of the appropriate degree of optical glasses can help the eyes to clearly image, so that the eyes are in a normal physiologi...Read more -
Does optical glasses have effect on myopia prevention and control
Single optical glasses Single-lens optical glasses are mainly used to correct vision, so that the wearer can see clearly. To a certain extent, it can help myopia patients to maintain clear vision when looking at a distance, reduce the adjustment fatigue caused by blurred vision of the eyes, and t...Read more -
What are the effects of refractive index and Abbe number of optical lenses on the vision of the elderly?
Effect of refractive index on visual acuity in the aged Lens thickness For the elderly with high myopia or farsightedness, it is more appropriate to choose a lens with a high refractive index. The high refractive index lens can be thinner than the low refractive index lens at the same degree, whi...Read more -
What kind of optical lens is more suitable for the elderly?
Choosing the optical lens material suitable for the elderly requires comprehensive consideration of the elderly’s eye needs, physical conditions and living habits. The following is a specific analysis of the suitability of resin lenses, PC lenses and glass lenses for the elderly: Resin lens...Read more -
How to choose the right optical glasses
Optometric data Accurate degree: Go to a professional eye institution or optician for optometry to obtain accurate myopia, farsightedness, astigmatism degree and axial position data. This is the basis for the selection of optical glasses, only the degree of accuracy, in order to effectively corre...Read more -
What is the influence of the size of sunglasses on the comfort of wearing?
Frame width Too wide: If the frame width is too large, the glasses are easy to slide on the face, especially in some light exercise or facial sweat, this situation will be more obvious. At the same time, too wide frames may exceed the facial outline, appear uncoordinated in appearance, and give p...Read more -
How to choose suitable sunglasses for sports?
Optical property Anti-ultraviolet ability: the eyes are exposed to sunlight for a long time during exercise, and ultraviolet rays are more harmful to the eyes. The UV400 logo of the sunglasses means that it can block more than 99% of the ultraviolet light, which is a necessary basic standard. Whe...Read more -
What are the differences in the standards for UV protection of sunglasses in different countries and regions?
China Relevant standards: mainly based on GB 10810.3-2006 “Glasses lenses and related glasses products Part 3: Transmission specifications and measurement methods” and GB/T 14214-2003 “General requirements and test methods for eyeglasses frames” and other standards. Specif...Read more -
What is the standard of UV protection function of sunglasses, and how to check its authenticity?
Relevant standard Ultraviolet protection factor (UPF) Definition: UPF is a measure of the ability of a fabric or material to block ultraviolet light, and in the case of sunglasses, it reflects the filter effect of the lens on ultraviolet light. The higher the UPF value, the better the protection ...Read more