Careers In Chemistry
Ophthalmology (Contact Lens Development)
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Acuvue introduced Acuvue Advance with Hydraclear lenses in 2005. The lenses allowed three times more oxygen penetration than other lenses of that time. The Hydraclear combines with silicon to form a soft, flexible hydrogel. The hydragel allows the lens to hold more of its own moisture, making them more resistant to drying. |
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| Bausch and Lomb developed PureVision lenses in 2007. These lenses allow for better oxygen flow to the eye, retain more moisture, keep irritants out, and allow for extended day and night wear. These lenses were made using the newly developed Balafitcon A. |
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Balafitcon A consists of a hydrophobic silicon gel that is bombarded with electrically excited gas molecules which change it to a hydrophilic silicate. This process is called Performa Surface Process. The hydrophilic silicate is called a Performa Surface. The gas bombardment is used over a coating because the matrix of the silicon gel is changed permanently. |
| AerGel is the finished product after the Balafitco A has undergone the Performa Surface Process. The AerGel controls lens dehydration. The PureVision lenses help maintain healty eyes by allowing much more oxygen to penetrate into the eye than any lens in the past. |
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Page by: Megan Steed
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