Final answer:
PureVision and PureVision2 contact lenses differ in center thickness, mid peripheral thickness, and edge thickness. The edge thickness of PV lenses can cause discomfort or irritation if not properly polished or if it comes into contact with the eye's tissues.
Step-by-step explanation:
PureVision and PureVision2 are both contact lenses made by Bausch + Lomb. They are similar in many ways but have some differences as well. In terms of center thickness, PureVision lenses have a center thickness of 0.07mm, while PureVision2 lenses have a center thickness of 0.06mm. This means that PureVision2 lenses are slightly thinner at the center.
When it comes to mid peripheral thickness, PureVision lenses have a thickness of 0.08mm, while PureVision2 lenses have a thickness of 0.09mm. This means that PureVision2 lenses are slightly thicker in the mid peripheral area.
Regarding edge thickness, PureVision lenses have an edge thickness of 0.14mm, while PureVision2 lenses have an edge thickness of 0.09mm. This means that PureVision2 lenses have a thinner edge.
The edge thickness of PV lenses can cause discomfort or irritation if the edge of the lens is not properly polished or if it comes into contact with the eye's tissues. It is important to ensure that the lens fits properly and is worn correctly to minimize any potential issues.