2022年12月13日 · One of the most popular types of contact lenses sold in America today are hydrogel, specifically silicone hydrogel, contacts. Hydrogel and silicone hydrogel contacts start out hard when they are dry, and they become soft when they get wet since they absorb water.

Silicone hydrogel lenses are a more porous type of soft contact lens than regular hydrogel lenses, allowing more oxygen to enter the cornea. It’s a hybrid of hydrogel and silicone that boosts the oxygen permeability of the lenses.

2019年2月27日 · Popular brands of silicone hydrogel contact lenses include Acuvue Oasys (Vistakon), Air Optix Aqua (Alcon), Biofinity (CooperVision) and PureVision2 (Bausch + Lomb). Silicone Hydrogel (Not Silicon Hydrogel) Contacts. Silicone hydrogel contact lenses sometimes are erroneously called silicon hydrogel lenses. Silicon is a very common mineral.

2021年6月25日 · Hydrogel lenses are made from gel-like, water-containing plastics called hydrogels. These lenses are very thin and pliable and conform to the surface of the eye. Introduced in the early 1970s, hydrogel lenses made contact lenses much more popular, thanks to improved comfort and ease of use.

Color Contact Lenses. Enhance your eye color or even change it completely. Colored contact lenses are fun and come in a variety of colors for both light and dark eyes. Silicone Hydrogels. Silicone hydrogels are soft contact lenses that have high oxygen permeability and …

2024年11月8日 · Hydrogel contact lenses offer comfort and high water content, making them a good choice for those with dry eyes, though they may be less suitable for extended wear due to gradual water evaporation. Silicone hydrogel lenses, on the other hand, allow higher oxygen flow, reducing the risk of corneal hypoxia and enabling longer wear.

Silicone hydrogels are the latest in a line of developments in soft lens material aimed at increasing the oxygen permeability (increased comfort, longer wear and better eye health), wettability (better comfort) and clinical performance of contact lenses.

Standard hydrogel and silicone hydrogel are the two primary materials used to manufacture soft contact lenses. Both materials create a soft, flexible, absorbent plastic that remains soft when hydrated with solution or water, and hardens as it dries.

Because hydrogel has a gel-like consistency, hydrogel contact lenses are suitable for those with sensitive eyes or dry eye syndrome. They can also help correct several refractive errors, including nearsightedness, farsightedness, astigmatism, and presbyopia.

2019年5月1日 · Traditional soft hydrogel contact lenses made from HEMA polymers utilize plastics that contain variable amounts of water.