Choose clear glasses with the right size for kids.
The choice of children's glasses should be based on the size of the child's face and the height of the nose. Most of the bridge of your child's nose is low, so you can choose an adjustable eyewear frame with a separate nose pad to avoid touching your eyelashes or wearing the glasses uncomfortably. If the frame is too small, the field of view will become smaller. The frame is too large, they are not stable, and the weight will increase. So children with glasses frame should be moderate in size.
Consider possible uncertainties after the lens is installed.
Usually, in-store frames are made of plastic samples rather than actual lenses, so they weigh slightly less. However, it is necessary to consider the approximate weight of the lens in advance according to its own degree when trying it on, in case the weight is not suitable for real wearing. If the pupil distance is too small, it is not suitable to wear a wider frame. The machinist should strictly follow the left and right pupil distance instead of taking the average, otherwise, there will be pupil distance error in the left and right eyes, which will cause discomfort in wearing.
Are night driving glasses good?
The color of night driving glasses can be selected from yellow to amber. Yellow lenses will reduce the light entering the eyes and reduce visibility. At night, this can be harmful. The lens filters out a lot of glare, but also filters out other visible light, making it difficult to see objects in dim or dark conditions.
Some people who wear night driving glasses say that they are more capable of seeing things at night. However, related test studies have shown that driving glasses at night does not improve night vision, nor can it help drivers see pedestrians faster than when they are not wearing glasses. A small study in 2019 showed that night driving glasses actually slow down the visual reflex by a fraction of a second, making night vision worse. So don't try to improve the safety of driving at night by wearing driving glasses with this kind of yellow lenses.
Does wearing sunglasses at night help driving? Like night driving glasses, sunglasses will reduce the amount of light entering the eyes, which makes them unsuitable for night driving and potentially dangerous.
What should drivers notice when wearing polarized glasses?
Many drivers like to wear polarized lenses. Indeed, the polarized lens can reduce strong light, eliminate glare, so that the line of sight is natural and soft, but the polarized lens is more suitable for fishing, skiing, and other large areas of the reflective environment. Drivers sometimes have to face the tunnel and another dark scene, the polarized lens is easy to make people suddenly feel dark at the moment. In addition, polarized lenses can make LCD screens and LED traffic lights dim. Therefore, when choosing polarizers, it is best to choose good quality optics, and when going through the tunnel, it is best to take off your glasses ahead of time and blink a lot. Before wearing the driver polarizing lens, try it on and observe whether the polarizing film of the lens is smooth. If the polarizing film is uneven, there will be inflow in the imaging, which may lead to visual fatigue and migraine.
Blue light in natural light
Blue light is not the unique light emitted by electronic products, but the visible light that exists in natural light, usually with a wavelength of about 400-500nm. The blue light in the entire waveband can be subdivided into two parts. One part will cause optical damage to the retina of the eye and accelerate the oxidative senescence of cells in the macular area of the retina. Usually, the wavelength of this part of blue light is between 415-450nm, and its damage to the eyes is gradually accumulated and formed. There is also a part of blue light that is beneficial to our human body, that is, blue light with a wavelength of about 480nm. It can adjust biological rhythms and is helpful for sleep, mood, and memory. In addition, experiments have confirmed that daily outdoor activities in the sun can effectively prevent the occurrence of myopia, and short-wavelength blue light may play an important role.
How to Adjust Crooked Glasses
If one side of your frame looks higher than the other, you need to adjust the arms of your glasses. So, how to adjust glasses?
If the right side is higher than the left, you need to gently bend the left arm down at the hinge or where the arm bends behind your ear. If the left side is higher than the left, so just do the same action on the opposite side.
When adjusting crooked glasses, you need to adjust frames a little bit at a time to avoid overcompensating and possibly damaging your glasses. You can run the arms under the warm water but do not running the warm water over the lenses because it will affect the lens coating.
What are optical frame glasses?
Optical glasses are transparent medium lenses. A pair of glasses usually consists of a lens, lens ring, nose pad, and temple, etc. The main materials are metal, plastic or resin, natural materials, etc. Through the refraction of the light, the central target can be clearly seen, thus playing a role in vision correction for the eyes with refractive abnormality.
