What characteristics do children's glasses have?
The lens degrees need to change with the degrees of the eye. Because children are still in the process of growth and development, especially preschool children and adolescent children. Preschool is the key period of visual development, and farsightedness is slowly reduced. The eyeball development is close to an adult. Adolescence is the second peak of eyeball development, and myopia is most in this stage and little by little deepens, stopping at the end of adolescence.
Take the right size
You will find that there are a variety of eyeglasses frames. Even if the eyeglasses look the same online, the effect of wearing them will be very different in different sizes. So if we want to choose glasses, we should try to do the measurement of the size, the width of the face, the distance between the eyes, and so on. We can calculate the size of the glasses to make sure the style fits your needs.
When do you need prism glasses?
If you experience symptoms of headache, dizziness, and nausea, then these symptoms may be caused by a subtle disorder between the eyes. This situation is called Binocular Vision Dysfunction(BVD). Double vision occurs in the situation that light enters the eye at the wrong angle and sends two different images to the brain. Some people have diplopia, where they can see only one image, and flat images are often blurry. Prism glasses can help to change visual deformities. Prism lenses can be helpful to prevent myopia and farsightedness in both eyes. If vision deteriorates in one eye, the eye muscle can use an external corrective prism to prevent blindness. Standard glasses are made of a combination of prisms that can correct the focal length errors and corneal curvature. The prism moves the image up and down or left and right to form an overall view.
Are rimless glasses more expensive than full-frame glasses?
In terms of brand pricing, there are several kinds of prices. For example, the cost of production should be considered. In reality, we ignore the cost of designing products by designers, the cost of workers' wages, and the cost of instruments invested in the early stage. The rimless glasses price is determined according to the material, so if you choose the material of relatively good, the price will be more expensive. In general, the eyeglasses frames are from about 50 yuan to hundreds of yuan. Of course, sometimes the price of rimless glasses is about thousands of yuan. It all depends on the material and lens. You can choose according to your own financial conditions.
What Should Be Considered When Buying Blue Light Glasses?
Be wary of “eye protection” claims. Some businesses advocate their anti-blue light products how miraculous.
Do not try the lens from the unknown lens manufacturer or lens factory. A professional lens factory needs more than ten years or even decades of accumulation, so do not be blinded by dazzling pictures and brand image.
How to buy contact lenses online?
Choose a standard retailer. Contact lenses belong to three types of medical device products, and the sale of contact lenses and their care solution belongs to medical behavior. No matter it is an optical shop or contact lens e-commerce website, it must have a Medical Device Trading Permit before it can be sold. The trend of buying contact lenses online is obvious, and there are a lot of websites of individuals and contact lenses that do not have business licenses. Therefore when the user buys a contact lens on the net, be sure to look for management qualification of Medical Device Trading Permit, guard against being cheated.
How to stop glasses hurting behind ears?
When adjusting glasses to the optical shop, you can let the staff check if the bending hook is flat. If there is a problem, put it on the polishing machine. The most important thing is that when adjusting the glasses, the height of the glasses temple should be adjusted according to the shape of each person's face, to further increase the comfort of the glasses. Furthermore, if you do not want to go to the optical store, you can make the glasses temple a little loose at home or put a little cotton or paper towel in the ear to prevent friction. You can buy soft eyewear online or at an eyeglass store to prevent ear friction and injury
