How To Use Contact Lens Correctly?
It is not recommended to use contact lenses when they are dry. Because when they are dry, even the nursing vacuole is used, the parameters change. It will affect the comfort of wearing, so it is recommended to replace the new lens. After the nursing liquid is used every time, you should cover the lid tightly. Do not touch the mouth of the bottle with your hand. If expired and unused, it should be discarded and replaced with new nursing fluid. As for your discomfort, you should return to the store for inspection.Contact lenses and glasses should be used interchangeably.
Disadvantages of polarized sunglasses
Polarized sunglasses have many benefits. However, in some cases, non-polarized lenses are a safer choice. On cloudy days, drivers find that non-polarized sunglasses are better than polarized sunglasses due to the lack of glare and extreme sunlight.
Driving with polarized lenses after snowing can be dangerous for drivers. As the glare of polarized sunglasses is blocked, ice or snow on the road will not be visible. In this case, the advantages of polarized sunglasses will become the disadvantages that may cause accidents.
In addition, when driving along a dark road with few street lights at night, wearing polarized lenses will make it harder to see the road conditions because they dim the available light better than non-polarized glasses. Of course, in low-light conditions, it is best to avoid wearing sunglasses completely while driving.
The most significant disadvantage of polarized sunglasses is that they do not perform well on digital screens and displays. They can cause the images and information on the LCD screen to blur or disappear at certain angles. Don’t wear polarized sunglasses to use these devices while driving.
Ways to improve driving at night
Check your eyesight and glasses regularly to ensure that your eyesight and the glasses you wear are in the best condition.
Clean the stains on the glasses before driving. The stains on the glasses will aggravate the glare.
Clean the windshield before driving at night to eliminate the hidden danger of glare.
Replace the wiper regularly.
Keep your vehicle headlights clean and free of dirt.
Do not drive for a long time, eat more foods that are good for eye health, and perform proper eye care.
If you feel that your night vision is reduced, you should go to the hospital for help in time.
In fact, if your eyes are healthy and you have no vision problems that require prescription glasses to correct, then the best glasses for driving at night is to not wear glasses at all. On the other hand, if you need prescription glasses because of myopia, hyperopia, or astigmatism, choose clear corrective lenses with an anti-reflective (AR) coating. These lenses can let almost 100% of the visible light into your eyes, can allow your eyes to correctly focus on roads and other obstacles at night, can reduce or eliminate the glare from street lights and headlights. Because they are based on your personal prescription, they provide the best vision for your eyes.
What Are Single Vision Lenses?
What are single vision lenses? You may have the same question. Single vision lenses have only one prescription for a given distance. Most reading glasses and distance glasses have single vision lenses because they are designed for people who are difficult in seeing either near or far. Some people are using their single vision glasses for both far and near depending on their types of prescription.
You can choose to wear single vision reading glasses to correct your eyesight if you have trouble reading text on your phone or computer screens. You can also wear single vision glasses to help you make out traffic signs while driving.
Single vision lenses for farsightedness are thicker at the center than those for nearsightedness, which are thicker at the edges. And the single vision lenses generally range between 3-4mm in thickness. The thickness varies depending on the size of the frame and lens material chosen.
After learning some information about one lens glasses, do you know the benefits of them? So, in the following part, we will show you the advantages of single vision lenses.
Buy Glasses For Kids - Proper Lens
The size of the lens mainly determines the size of the eyeglasses. The outer edge of the rim of the lens should be on the outer edge of the orbital bone. If it is larger than the face, the rim of the lens frame will be too big. If the lens is only as big as the eye, the frame can easily deform. Resin and hard lenses should be considered first because glass lenses are fragile and easy to damage children's eyes. Resin lens mainly needs the accuracy of the axis of scattered light. The matched luminosity must be accurate. There are no scratches, no bubbles, and no impurities on the lenses. The degree of the lens selected for the child must conform to the quality testing standards promulgated by the state, and the error of the diopter should be within the range of the requirements of the national standard.
How to Tell If Your Progressive Lenses Are Correct?
Progressive lenses are popular among people who are over 40 and they can be used to correct presbyopia. If you have a pair of progressive lenses, how can you tell if the progressive lenses are correct or not? If you do not know, you come to the right place. This post will show you how to tell if your progressive lenses are correct.
How do I know If I have progressive lenses? There are two parts of the lens you can check. The first is how the lens sits in front of your eyes. If you are not able to see in the distance, either centration is way off the lenses are too high or the lens power is not correct. However, when checking the lens sitting in front of your eyes, you should be able to maintain a natural posture in your neck and see sharp when reading or while focusing on the distance. If you raise your chin high while reading or hold it low to see in the distance, it is not correct.
Disadvantages of Progressive Lens
There are deformation areas under the left and right sides of the lens, which make the image blurry and irregular. It takes 1-3 weeks to get used to it. In addition, it has a narrower field of view in the near and middle distances, and long-term concentration on the narrow focal point can easily make the eyes tired. Suitable for people who need to alternate between distant, medium, and near vision.
However, with the development of science and technology, more and more progressive multifocal glasses have emerged that have a wider field of view, more comfortable wearing, and better meet the needs of eyes. Nowadays, the use rate of progressive lenses among middle-aged and elderly people abroad is quite high. Single-lens and double-lens reading glasses are gradually being replaced by progressive multifocal glasses.