The disadvantages of progressive lenses
- The field of view in the near and middle distances is relatively narrow.
- The adaptation time is longer and patients with greater astigmatism are not suitable for wearing.
- The peripheral aberration is large, and there will be large astigmatism in the periphery.
Blue light blocking glasses lenses and common glasses lenses have different colors.
The real blue-light-blocking glasses should be yellow. Based on the primary principles of optics, the light reflected from the lens is the light that resists the same color as it. As the name indicates, blue light is to prevent the reflection of blue light. Remove blue light, and all the red, yellow, blue, and green in visible light is yellow.
Wooden frames: Wooden frames are one of the hottest new trends that pair perfectly with round face shapes. The natural materials used on these frames give this style an elegant feel.
Wayfarer glasses: As for how to choose glasses for round faces, wayfarer glasses are recommended. These frames will bring a touch of old Hollywood to your look. In addition, their distinctive angles add contrast to your features.
So, from the above information, you can know that round faces glasses come in all sorts of shapes and colors. In addition, you can also try Koalaeye glasses, which are stylish and come in at a cheap price.
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.
Which Reading Glasses Are Most Suitable for Me?
If you have never previously required prescription glasses to improve your vision such as nearsightedness or farsightedness or astigmatism, it is highly like that you can correct your vision with non-prescription reading glasses.
People around the age of 40 to will benefit from the low power reading glasses because of the progressive nature of presbyopia. In other words, you do not need prescription glasses to correct your vision.
However, if you are around the age of 60 or older, the strength of the reading glasses will increase. However, you do not need prescription glasses.
Polarized vs non-polarized sunglasses
Non-polarized sunglasses generally only have the two basic functions of shielding strong light and filtering ultraviolet rays, and their efficiency in filtering ultraviolet rays is low. In our daily life, in addition to strong light and ultraviolet light, when light passes through uneven roads, water surfaces, and other places, irregular diffuse reflection light will be generated, which will cause blurred vision and fatigue in the eyes.
Polarized sunglasses can filter out this kind of light, only absorb the reflected light of the object itself, truly present what you see, make the field of vision clearer, and reduce visual fatigue. In addition, polarized sunglasses have a 99% blocking rate of ultraviolet rays due to their high-efficiency filter layer, which can effectively reduce the damage of ultraviolet rays to the eyes.
When judging whether the sunglasses are polarized lenses, you can rotate the sunglasses up to 45° clockwise. If the color of the lens changes at this time, and the color of the sunglasses returns to normal after turning the sunglasses back to the original position, then it can be judged that the sunglasses are polarized. And if you can’t see the change in the color of the sunglasses lens no matter how you turn it, then you can judge that the sunglasses are not polarized.
Best Eyeglasses For Women - Seiko glasses
Seiko frame pursues the perfect combination of elegant fashion and high-tech, providing people with excellent quality, fashionable style, and high comfort products. Seiko pure titanium eyeglass frame is the most noteworthy, and it is very rigorous in the selection of materials, high hardness, good quality. Women's spectacle frames adopt the world's popular carved design, making glasses practical and beautiful already.No matter you are engaged in what kind of occupation, they can highlight your noble temperament. They make the wearer feel comfortable, and at the same time, let each wearer can send out a distinctive temperament and taste.