How to choose contact lenses
The choice of contact lenses depends on the material, water content, oxygen permeability, brand, whether they have special functions such as UV protection and blue light protection. As a professional eye health researcher in the industry, Mike has sorted out some small details and explained them to you.
First, the material of contact lenses Contact lenses are currently mainly based on hydrogels (ionic, non-ionic) and silicone hydrogels. Silicone hydrogel is actually a derivative of hydrogel. Ophthalmologists concluded from the length of wearing the lens and the state of the cornea: the lens with high oxygen permeability produces less red blood in the same time period and can be worn for a longer time. The researchers added silicon-containing monomers to the lens material according to the principle, thereby increasing the oxygen permeability of the lens. Also because silicon has good oxygen permeability, it is loved by most people.
Hydrogel supplement: The oxygen permeability of hydrogel is much lower than that of silicon hydrogel. In order to increase the oxygen permeability of some hydrogel products, the water content of the lens can be increased to achieve the "high oxygen permeability effect". It is true that the higher the water content, the more comfortable it is to wear, but at the same time, it also brings problems such as dry eyes, sourness, bloodshot, etc., which make it impossible for some users to wear it for a long time. Non-ionic supplements: lenses are generally thin, comfortable to wear, less prone to protein precipitation, and more conducive to correct wearing; silicone hydrogel supplements: the current technology for adding silicon materials has not been broken through, so some brands of silicone hydrogels feel biased when wearing. Hard and not moisturizing, some are not as comfortable to wear as hydrogels. Because of the strong adsorption capacity of silicone hydrogel, it is easy to precipitate lipids and proteins, so it rarely exists in products with a monthly throwing cycle or more. In addition, the cost of silicone hydrogel itself is relatively high, and the product will be more expensive;
Second, the water content of contact lenses
In theory: under the premise of the same material, the higher the water content, the better the oxygen permeability, the softer the lens, and the more comfortable it is to wear. But this is not an absolute thing, and it needs to be based on each individual's individual situation to see which one is more suitable.
The eyes themselves are prone to dryness or the air pressure conditions for outdoor sports are not good enough. If the lenses without the water-locking function want to maintain their own shape, they have to absorb water from your eyeballs, then the eyes will obviously feel dry. It is recommended that you have sensitive eyes and are prone to dryness, and when you go out for running, you can choose products with medium and high water content and with a water-locking function. For the cycle selection, try to choose daily throws, because short-cycle products do not require care, which greatly reduces protein and lipids. Risk of precipitation. Here is an advertisement for Xiaoyou. Our first-zero 55% water-containing water-locking sheet daily disposable contact lenses is an upgraded version of the original 38% water-containing film. It adopts the original water-locking film technology; of non-ionic lenses.
Its main technology is to form a water-locking barrier with a film on the surface of the lens, which can effectively maintain the water for 8 hours without loss, and has an ultra-thin edge design; the overall feeling of wearing it is very moist and comfortable, and it is not easy to exercise. There will be any feeling, and the daily throw is ready to use, only 3.3 yuan per piece, clean and hygienic, no daily care ~
Thanks for time reading.
Sophie Yang
004@mikeeyewear.com
