Astigmatism

 

Sometimes, the surface of the cornea is curved more like a football, with both flatter and steeper curves. When the surface of the cornea has an uneven curvature, vision becomes distorted. This common irregularity, called a “corneal astigmatism,” causes blurred or distorted vision because light rays are not focused at one spot to provide clear vision.
A person who has both a cataract and a corneal astigmatism will not regain high-quality distance vision after surgery to remove the cataract unless the astigmatism is also corrected.

If you depend upon eyeglasses, you may have experienced the inconvenience of not being able to find your glasses when you really need them. Eyeglasses are easily lost or damaged, expensive to replace, and inconvenient to clean and maintain. The more active you are, the more eyeglasses interfere with your lifestyle by complicating your participation in daily and recreational activities. The AcrySof® IQ IOL can reduce your dependence on glasses.

AcrySof® IQ Toric Astigmatism IOL(Intraocular Lens)

 

A better option for quality distance vision in patients with astigmatism. In the past when cataract surgery was performed a spherical intraocular lens was implanted. In people with astigmatism this still left them with blurred vision due to pre-existing corneal astigmatism. Standard intraocular lenses cannnot correct corneal astigmatism, now with the advent of the Acrysof Toric lens astigmatism can be corrected to improve a patient's uncorrected vision. Simply put, the patient can now see more clearly without glasses. To achieve quality distance vision with a standard IOL, you may still require eyeglasses, contact lenses, or further surgery.

If freedom from eyeglasses for distance vision is important to you, you now have a better option. The unique design of the AcrySof® Toric lens provides significantly improved distance vision and may reduce the need for corrective lenses.

The yellow tint provides protection from harmful high enery blue light. Addtional filters are also present to protect from Ultraviolet light. UV and blue light may contribute to macular degeneration.

The new IQ version of the Acrysof Toric has been made with an advanced aspheric design to enhance image quality and improve vision especially at night or other low contrast environments.

Functional vision is an important consideration for people with astigmatism. When it comes to object detection and identification, seconds can matter — particularly in low-visibility conditions, like night driving.

In clinical tests, the aspheric design of the AcrySof® IQ IOL was statistically and clinically shown to improve functional vision in challenging, low-visibility environments. Patients were tested in night driving conditions that simulated city and rural settings under normal, glare and fog conditions. Patients were asked to detect and identify various types of visual targets. Performance in12 of these conditions was statistically significant, with the greatest advantage observed in detection and identification of city pedestrians and rural warning signs under glare and fog conditions. AcrySof® IQ IOL improved functional vision (versus the control lens) by giving patients greater time to take appropriate action.

Dr. Liva uses multiple intruments to determine amount and axis of the corneal astigmatism to be corrected. These include the Zeiss Atlas Corneal Topographer, the Nidek computerized auto-keratometer, manual keratometry, and measurements from the Zeiss IOLMaster. Consideration of measurements from all these devices helps to increase the accuracy of choosing the proper lens power to be implanted and the axis of astigmatism for positioning the lens in the eye at the time of surgery. Astigmatism