What is the AcrySof® IQ ReSTOR® IOL?
This intraocular lens is used during cataract surgery to give the patient the ability to see distance, near and in between following their surgery. Cataract surgery involves taking out the cloudy lens (cataract) behind the pupil and replacing the human lens with an artificial lens.
How Does the AcrySof® IQ ReSTOR® IOL work?
The first intraocular lenses made only had a single strength or power. This could provide a patient with good vision after cataract surgery for distance (as long as the patient does not have any astigmatism) but did not provide any correction for reading. Apodized diffractive and refractive technologies of the ReSTOR® intraocular lens provide quality distance, intermediate, and near vision. This provides the patient with increased independence from wearing glasses.
Apodized Diffractive Technology
Diffraction is the spreading of light as it passes through a lens. The center of the ReSTOR® consists of a series of rings which causes diffraction of light. Apodized is a gradual tapering of the different rings (diffractive levels or steps) on the surface of the lens. This creates a smooth transition of light between distance, intermediate, and near allowing the patient to see at these different distances. The Apodized rings of the ReSTOR® lens provides the patient excellent distance, intermediate, and near vision.
Refraction means the redirection of light as it passes through a lens. The outer ring of the ReSTOR® lens is the area of the lens designed for focusing distant objects in a clear manner onto the retina.
The human eye contains some imperfections or aberrations even in people with good vision without glasses. Spherical aberration (a form or type of aberration) can lead to a reduction in visual acuity and/or quality of vision. The aspheric design of the AcrySof® IQ ReSTOR® IOL can correct spherical aberrations, which can improve the quality and clarity of vision.
Clinical Study Results for the AcrySof® IQ ReSTOR® IOL
Binocular Vision in Bright Light
Uncorrected Near Vision
20/40 or worse 1.4%
20/40 or better 98.6%
20/32 or better 87.0%
20/25 or better 69.6%
20/20 or better 46.4%
Uncorrected Distance Vision
20/40 or worse 0.0%
20/40 or better 100.0%
20/32 or better 95.7%
20/25 or better 88.4%
20/20 or better 58.0%
Other Lens Performance
ReSTOR® IOLs provide the same ability for patients to identify road signs and hazards at night as with single vision or monofocal lenses under normal driving conditions.
Both fog and glare do cause a difference between ReSTOR® IOLs and single vision IOLs. The mean differences were less than 15%.
The AcrySof® IQ ReSTOR® IOL provides excellent results, allowing people to see distance, intermediate, and near without glasses. Clinical studies indicate that 95% of patients were so satisfied with their vision that they would have the ReSTOR® IOL implanted again. There are some complaints of decreased contrast sensitivity, glare or rings around lights at night, blurred vision, and trouble reading in dim light associated with the ReSTOR® IOL. Patients with existing ocular disease, do large amounts of night driving, have problems with glare, and prior refractive eye surgery may not be good candidates for this lens. You should discuss this with your eye doctor whether you are a good candidate for this new innovative technology.