Contact lenses home made water
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How are contact lenses made?
Millions of contact lenses are ending up in the water - CBS News
By Nina Nelson Beauty Health. Saline solution is something we purchase regularly in our house. Not limited to eye and contact lens care, saline solution can also be used for wound irrigation and as a nasal rinse. Until now. However, I approached saline solution with a bit of trepidation, mainly because of the importance of keeping things sterile which, for some reason, scares me away. Thankfully, making your own saline solution is a relatively simple procedure. Before you proceed, though, I recommend reading through these safety tips, as you need to be extra cautious if you intend to use this for your contacts.
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Water & Contact Lenses
Millions of people wear contact lenses to correct their vision, enhance their appearance, and protect injured eyes. The success of contacts is related to their relatively low cost, comfort, effectiveness, and safety. While old contact lenses were made of glass, modern lenses are made of high-tech polymers. Take a look at the chemical composition of contacts and how it's changed over time.
Soft contacts are made of pliable hydrophilic "water-loving" plastics called hydrogels. Hydrogels absorb significant amounts of water to keep the lenses soft and supple. Because of this water-loving characteristic, the water content of various hydrogel contact lenses can range from approximately 38 to 75 percent by weight. Different brands of soft contact lenses have different water content and lens thickness.