Purevision 2 with HD Optics for Astigmatism from Bausch and Lomb are are a silicone hydrogel contact lens designed to correct astigmatism.
Purevision 2 for Astigmatism are made of a unique material called AerGel that lets natural levels of oxygen to reach your eyes so that they stay comfortable and healthy. The lenses are also designed to resist protein and debris build up. This means your lenses stay cleaner for longer, helping your eyes stay healthy.
Purevision 2 for Astigmatism are a silicone hydrogel contact lens so have been approved for overnight wear*. You can wear Purevision 2 for Astigmatisml contact lenses continuously for up to 30 days and 29 nights, this means you can wake up in the morning seeing clearly. They are also an excellent choice for someone looking for high levels of comfort from a daily wear monthly disposable contact lens, with the added benefit of sleeping in your lenses should you want to.
Purevision 2 for Astigmatism and Purevision 2 HD for Astigmatism are the same lens. Bausch and Lomb originally used the HD as a marketing tool to raise awareness of the High Definition optics contained within the lenses. Most packaging no longer displays the HD logo, but the lenses within the box are Purevision 2 HD - High Definition optic.
*It is advisable to check with your eye care professional as to suitability before wearing overnight contact lenses.
Toric contact lenses have been designed to correct astigmatism, which is a structural disorder in the eye, or eyes, that often cause blurred vision.
Toric contact lenses are specifically designed to address the abnormal shape of the cornea (corneal astigmatism) or lens (lenticular astigmatism) by altering the focusing power, they are also stabilised either by a thickening or a weighting at the bottom of the lens to provide stability during blinking to help create a smooth, clear visual experience.
All contact lenses require a power (PWR) this can be in the form of a plus (+) for longsightedness or a minus (-) for shortsightedness, a toric contact lenses has two other reading that are important the Cyl and the Axis.
The Cyl on a toric contact lens prescription refers to the amount of astigmatism you have and will be in proceeded by a minus (-) sign. If your prescription has a figure i.e -1.25 in the Cyl box then this would indicate you have astigmatism.
Once it has been determined that you have astigmatism and how much, this then needs to be corrected, this is where the Axis comes in.
The Axis indicates the orientation of the astigmatism. In a contact lens prescription the Axis will be a multiple of 10 and up to 180, however in a glasses prescription it will be a multiple of 2.5 degrees.
Manufacturer: Bausch +Lomb
Wearing Type: Toric continuous wear
Power Range: +6.00 to -9.00
Base Curve(s): 8.9
Cyl: -0.75D, -1.25D, -1.75C, -2.25D
Axis: 10°-180° in 10° steps
Lens Material: Balafilcon A
Water Content: 36%
Oxygen Permeability: 91Dk/t
Handling Tint: Yes, light blue
UVA/UVB Protection: No
Quantity per Box: 6 Contact lenses per box
I have used these lenses for two years now and are impressed by the performance. In the beginning they felt a bit thick (coming from Freq Excel) but once you get used to them you really appriciate the extra comfort that comes with not having to worry about getting dry eyes. I also think the sharpness is really impressive and event though I have 110 astigmatism I always have a perfect vision. Sleeping with them is not what I normally do even though it works for a night or two.
I usually wear the Purevision Toric extended wear and went for these as I thought they would be a step up, and WHEN they work they are, my vision was noticeably sharper. However the lenses do not sit on my eye nearly as comfortably as the other Pure vision lenses, they seem to move around a lot more leading to blurred vision, so much so that after three weeks I've gone back to the old lenses. A shame, as when they work they are really very good indeed.