Optimized Toric Lens Geometry™ is a proprietary toric lens design developed by CooperVision, a world leader in toric contact lenses for patients with astigmatism. This design is multifaceted to ensure optimal and predictable visual acuity, fit, and comfort.
Optimized Toric Lens Geometry consists of the following design features:
- Uniform horizontal ISO thickness – A uniform horizontal ISO thickness improves stability by reducing lens rotation. It also provides consistent fit and better visual acuity.
- Wide ballast band – A wide ballast band increases the area of the lens that’s devoted to stability and a comfortable fit. It also helps to orient the lens for better performance.
- Smooth, continuous surface – A smooth, continuous surface helps to maximize comfort with every blink.
- Larger toric optic zone – A larger toric optic zone provides clear vision over a wide range of lens powers.
- Unique back surface curvature – The design’s unique back surface curvature helps to keep the lens in place for a more stable and dependable fit.
Optimized Toric Lens Geometry ensures that astigmatic patients get the visual acuity and stability they need.
Why is stability important for toric contact lenses?
Astigmatism is an imperfection in the curvature of the eye that causes blurred vision. In astigmatism, the refraction of the eye is different between the vertical and horizontal planes, which causes blurred vision. For some people with astigmatism, vertical lines also appear to tilt.
People with astigmatism experience blurred vision when wearing standard contact lenses. Toric contacts provide different refractive powers on vertical and horizontal planes to correct astigmatism. The planes must be oriented in just the right way and remain stable to correct vision.
While lens movement on the eye is important for healthy contact lens wear, too much movement with toric contact lenses can drastically diminish the quality of vision for the astigmatic wearer. For this reason, manufacturers design toric contact lenses with certain stabilizing features. These include:
- Thin-thick zones – Some toric contacts have areas that are thicker than the rest of the lens. These thick zones help to orient the contacts properly and keep them from rotating.
- Lens truncation – When a lens is truncated, a portion of it is cut off. The size of the piece cut off will depend on the size of the lens. The truncation primarily stabilizes the lens when the lower flat edge lies adjacent to the lower eyelid margin.
- Ballasting – A prism is used to orient and stabilize the lens in ballasting. In contact lenses with a prism-ballast design, a portion of the lens is heavier than the rest, and this portion acts as a weight to keep the lens from rotating out of its proper position. Manufacturers determine the amount and location of the prism in their toric contact lens designs, so no two designs are the same.
Contact Lenses With Optimized Toric Lens Geometry
Optimized Toric Lens Geometry is unique to CooperVision’s Avaira Toric, Avaira Vitality™ toric, Biofinity® toric, Biofinity toric multifocal, and MyDay® toric.
1. Avaira Toric
Avaira Toric contacts are 1-2 week disposable lenses that correct astigmatism. These contacts stay in place due to Optimized Toric Lens Geometry, and they’re incredibly comfortable because of CooperVision’s innovative Aquaform® Technology.
2. Avaira Vitality toric
Avaira Vitality toric contacts provide astigmatic patients with crisp, clear vision. Thanks to Optimized Toric Lens Geometry, these 1-2 week disposable contacts stay put throughout the day. They also have the highest class UV blocker available in a contact lens.
3. Biofinity® toric
The most prescribed toric lens on the market, Biofinity toric contacts offers a remarkable balance of comfort, breathability, and excellent visual performance. Thanks to Optimized Toric Lens Geometry, they also feature a dependably stable fit.
4. Biofinity toric multifocal
Biofinity toric multifocal contacts combine proven optical lens design technologies to deliver clear vision at any distance. These include Optimized Toric Lens Geometry for optimal stability, Balanced Progressive® Technology for excellent visual performance, and Aquaform Technology for long-lasting comfort.
5. MyDay toric
MyDay toric contacts are designed for astigmatic patients who prefer the convenience of a daily disposable lens. Featuring Optimized Toric Lens Geometry, MyDay toric contacts stay in place throughout the day for consistently clear vision. These contacts also feature Aquaform Technology to keep eyes comfortable all day.
Ask your eye care professional about CooperVision’s toric contact lenses with Optimized Toric Lens Geometry for clear, stable vision.