Different Type of Lenses: How to Choose
In this section, we will list some of the lenses for glasses.
Plastic lenses: In 1947, the Armorlite Lens Company in California introduced the first lightweight plastic lenses. The lenses were made of a plastic polymer called CR-39, because it was the 39th formulation of a thermal-cured plastic developed by PPG Industries in the early 1940s. Plastic lenses are light and low cost.
Polycarbonate lenses: polycarbonate lenses were first introduced in the 1970s and they have become increasingly popular anad remained for a long time. Polycarbonate glasses are slighter and significantly more impact-resistant than CR-39 plastic, making them a preferred material for children’s eyewear, safety glasses, and sports eyewear.
Silhouette Rimless 5541 TMA The Icon II
Silhouette Rimless 5541 TMA The Icon II is an example of an innovative rimless frame structure. The unhinged temple is gently rounded to match the shape of the head for a comfortable, safe fit. Made from not heavy, hypoallergenic titanium, the glasses are strong enough to embrace the most active lifestyle while maintaining a stylish look.
Contact Lens Materials - Non-HEMA materials
The non-HEMA materials are hydrophilic soft lens material, which does not contain HEMA components. They are stronger and more oxygen permeable than most HEMA polymers.
The water content of regular hydrogel lenses varies from 30% to 58%. When oxygen passes through the hydrogel, it needs to be carried by water molecules in the material. Therefore, the higher the water content of the lens, the higher the oxygen permeability value. The softer the lens, the more comfortable it is to wear, which is conducive to the metabolism of the cornea. However, at the same time, the higher the water content of the lens, the faster the water evaporation, easy to dehydration, and easy to cause dry eyes. A lens with high water content has low material density, poor durability, and easy breakage, so they are suitable for making lenses that are frequently changed or discarded. On the contrary, the lens with low water content has good formability, easy operation, durability, and is not easy to dehydrate and cause dry eyes.
Eachsee glasses
Eachsee glasses is a professional online glasses platform! They focus on providing high-quality online glasses services for urban white-collar workers, fashion, and high-end business people. With the manufacturer's direct supply, they have the whole category of self-management. Glasses matching is strictly implemented in accordance with national standard 2011: multiple quality inspection links.
The characteristics of suppleness, lightweight and non-deformation
Pure titanium glasses have the characteristics of ultra-high flexibility, ultra-light, and not easily deformed. Pure titanium spectacle frames get rid of the shortcomings of ordinary spectacle frames that are stiff, heavy, and easily deformed. Medically implanted high-grade plate materials, combined with the color electroplating process, highlight youthful vitality and three-dimensional sense, making our facial features more refined. The nose pads are stable, not slack, and highly conformable, which avoids the embarrassing moment of the glasses frame falling down. And pure titanium glasses can make you look stable and reliable, and people can't help giving you more trust.
Different styles of glasses
If the style of new glasses is different from the old glasses, the angles of the glasses are also different. So the new glasses will cause visual differences. The symptoms of dizziness after wearing the new glasses will occur after a short period of time. If you adapt, you should be able to return to normal.
In order to avoid discomfort in wearing glasses due to inaccurate optometry, experts suggest that myopia should choose a professional eye hospital for medical optometry. When the glasses are damaged, they should be replaced in time to avoid injury to the eyes.
The nose pad is very important.
It could be that the nose pad is too hard. You can replace it with a non-marked soft nose pad. It is recommended to choose a thin and long or broad-leaved nose pad, moderate hardness, which can effectively disperse the force of the nose, with stable support, bringing comfortable wearing. It avoids a soft nose pad on the bridge of the nose because of sweating or a long time to wear left indentation. Eyeglass frame nose pads are in direct contact with the bridge of the nose, and too hard nose pads can damage the skin around the bridge of the nose. Therefore, try to choose a silica gel nose pad and other soft materials. The first one is that the silicone has good softness and will not damage the skin. The other is that it can fit perfectly with the bridge of the nose without foreign body feeling.
