What Are the Disadvantages of High-Index Lenses?
This section will show high index lenses disadvantages.
- High index lenses are made from a chemical synthetic blend that’s created through a special manufacturing process. So, high index lenses are expensive than regular lenses. In fact, the price may be more than double that of the traditional counterparts.
- High index lenses can be more brittle than their traditional counterparts and may also be more prone to scrapes and scratches. This can impact their overall durability.
- High index lenses are more reflective than regular lenses, which can make them less effective for brightly lit work environments, outdoor use and nighttime driving on busy highways.
- High index lenses have greater potential for distortion, particularly in your peripheral vision because the high index lenses have a higher Abbe value than prescriptions made from standard plastic or glass.
How to Find Reading Glasses Strengths?
With the increase of age, your vision may begin to decrease and this is an inevitable change in your life. So, when you are trying to decipher some smaller prints, you may need the reading glasses.
When your vision begins to decrease, do not worry, this is a normal change. You will find that the deterioration insight often occurs around the age of 40. The technical term for this condition is called presbyopia, a natural, age-related change in the lens of the eye which makes it more difficult to focus on smaller print and close-up objects.
The condition may become worse as you are near 60 years of age, depending on the type of near distance tasks you performing. Of course, you also need to consider the actual situations.
Disadvantages of Progressive Lenses
It takes time to adapt to the lenses. It can generate poor visual resolution (blur). There is also a geometric distortion of the field of view. Some of the problems with advanced progressive lenses occur when walking up and downstairs. Because the reading correction is at the bottom, the staircase may look like a rebound. However, this is all done to accommodate your progressive lenses, and within about two weeks the shortcomings should disappear. It takes some time to get used to progressive lenses. Changes in vision occur at the rim of the lens, leading to slight changes in peripheral vision. For some people, change is a little difficult. Because the first wear of progressive lenses may occur slight dizziness, shaky walking. One should be careful when they exercise or go Up and down the stairs. Because the sense of space changes, the distance judgment of the object, the sense of depth changes, people who first wear should not immediately drive or do strenuous exercise. When looking closely, the eyes need to turn down, they have mild discomfort in the eyes. The object becomes blurry when they look at it through a blurred area around the lens. Therefore, new wearers turn their heads more and turn their eyes less when they see things and try to use the far, near, and middle distance areas to see the object.
Blue Light Glasses Benefits
As mentioned above, blue light glasses are good for our eyes. What are the other benefits of blue light glasses?
1.Reduce Eye Strain
One of the benefits of blue light glasses is reducing eye strain. Looking at a screen all day can make you feel stressed, or you may experience eye and muscle strain. So, the blue light blocking glasses can help to reduce eye strain.
Blue light has a high frequency which can increase alertness and delay the body’s release of melatonin. So, you had better turn off your device an hour or two before going to bed. Or you can choose to wear a pair of blue light glasses to sleep better.
Wearing blue light glasses can effectively help you to reduce headaches.
4.Fewer Eye Diseases
A large amount of blue light is bad for our health. So, wearing blue light glasses can reduce the chance of eye diseases.
With so many blue light glasses benefits, do you want to get a pair of blue light blocking glasses? If so, you can try the Koalaeye Optical blue light blocking glasses. It enables you to wear comfortable and look in style at a reasonable price.
Semi-Rimless Frame Glasses
Half-rim spectacle frames replace part of the spectacle frames with nylon wire, giving people the feeling of bottomless frames. It is lighter and looks more chic and firm. If you are a highly myopic friend, choose a pair of half-rim glasses, which can not only reduce the load on the bridge of your nose but also look more fashionable. Half-rim glasses are the first choice for men in the workplace, and they are more mature and stable.
The lenses of Walmart Glasses
When Walmart first entered the eyewear business in 1991, Walmart was known for its affordable lenses, which were similar to other big stores and eyewear chains. Then, in 2000, Walmart began offering high-end Carl Zeiss lenses. Customers have noticed the change and they continue to strive to become a leader in eyewear quality. Walmart has led the way in applying anti-reflection and anti-scratch coatings to its lenses. From the beginning, Walmart took steps to provide the best products on the market, with quality levels that exceeded industry standards. The upgrades now underway will continue to deliver on that promise.
As a sub-brand of luxury Armani, it is a high-end eyewear brand. It is representative of exquisite quality and noble luxury, and it pays attention to details and displays noble temperament. The handmade frame, superb craft, and workmanship make the charm of the Armani spectacle frame show in front of everyone. The medical environment-friendly silicone nose pad is designed according to the structure of the human nose bridge, which not only fits the nose more but is very comfortable. The prices of the Armani frame are basically around 1500 yuan.