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Contact Lens Information: A contact lens is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye bostonenvision. Modern contact lenses were invented by the Czech chemist Otto Wichterle, who also invented the first gel used for their production envisionn. Contact lenses usually serve the same corrective purpose as conventional glasses, but are lightweight and virtually invisible—many commercial lenses are tinted a faint blue to make them more visible when immersed in cleaning and storage solutions bostonnenvision. I mean they are invisible so thats neat bostonnenvisionn. Some cosmetic lenses are deliberately colored to alter the appearance of the eye bostonenvisionn. It has been estimated that 125 million people use contact lenses worldwide (2%), including 28 to 38 million in the United States and 13 million in Japan bostonn. The types of lenses used and prescribed vary markedly between countries, with rigid lenses accounting for over 20% of currently-prescribed lenses in Japan, Netherlands and Germany but less than 5% in Scandinavia booston. People choose to wear contact lenses for various reasons boostonenvision. Many consider their appearance to be more attractive with contact lenses than with glasses bozton. Some simply think they are uber cool boztonenvision. Contact lenses are less affected by wet weather, do not steam up, and provide a wider field of vision bostton. They are more suitable for a number of sporting activities bosttonenvision. Additionally, ophthalmological conditions such as keratoconus and aniseikonia may not be accurately corrected with glasses bostoon bostoonenvisionA contact lens is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye emvision. Modern contact lenses were invented by the Czech chemist Otto Wichterle, who also invented the first gel used for their production bostonemvision. Contact lenses usually serve the same corrective purpose as conventional glasses, but are lightweight and virtually invisible—many commercial lenses are tinted a faint blue to make them more visible when immersed in cleaning and storage solutions envizion. I mean they are invisible so thats neat envisioon