It is Sulphonation of Copper. It is generally available in 5H2O (Crystal) form, though anhydrous is also available. Copper sulphate, blue stone, blue vitriol are all common names for pentahydrated cupric sulphate, which is the best known and the most widely used of the copper salts.t is Sulphonation of Copper. It is generally available in 5H2O (Crystal) form, though anhydrous is also available. Copper sulphate, blue stone, blue vitriol are all common names for pentahydrated cupric sulphate, which is the best known and the most widely used of the copper salts.
Disposable soft lenses. Contact lenses were first recognized in 1945 by the American Optometric Association. Over 38 million people wear contacts in the United States alone with international numbers topping 125 million. As more and more people receive proper eye care, the use of contact lenses continues to grow.
In Europe and Asia, Daily Disposables are one of, if not the leading modality for contact lens wear, but in the US, daily disposables have captured only about 5% of the contact lens market. The primary reason is cost-to wear daily-disposable contact lenses full-time, you need about 360 pairs a year.oreover, daily-disposable contacts are generally considered the safest and healthiest type of contact lenses because the use of a fresh pair of lenses every day minimizes the chance for build-up of harmful pathogens on the lens surface. Each of the major US contact lens manufacturers offers a daily disposable contact.