What is the AcrySof® IQ Toric Intraocular Lens (IOL)?
The AcrySof® IQ IOL is used during cataract surgery to replace the cloudy lens inside the eye. The AcrySof® IQ IOL not only helps correct for a person being nearsighted or farsighted but corrects the astigmatism a patient may have prior to the surgery. This allows a person to have good distance vision with less dependence on glasses.
What is Astigmatism?
In simple terms, someone who has astigmatism means that the cornea (clear portion of the eye in front of the iris) is shaped more like a football cut length wise in half versus a basketball cut in half. Therefore, light will not be focused to a sharp clear point on the retina with astigmatism but will be focused to a line. The causes blurred vision along with ghost images which can normally be corrected by glasses or contacts.
How does the AcrySof® IQ Toric IOL Work?
The lens is shaped in a way that corrects the astigmatism just like in glasses. The astigmatism will be located in a specific orientation on the eye and is measured in degrees around the eye (90 degrees is vertical on the eye). There are small marks on the IOL so that the astigmatism correction can be place inside the eye in the proper axis or degree. Prior to cataract surgery, the eye is measured with special equipment to determine the strength of the IOL.
Other Aspects of the AcrySof® Toric IQ IOL
Proven biomechanics and biomaterial aspects of the IOL ensure minimal movement or rotation inside the eye with less than 4 degrees of rotation.
Stableforce® haptics keep the IOL stable and centered in the eye.
Flexible haptics design helps with proper placement inside the eye.
AcrySof® lens material promotes adhesion of the capsule (membrane that surrounds the human lens and holds the IOL in place) to the IOL.
The lens design provides reduced spherical aberration which improves the quality of the vision after cataract surgery.
The aspheric design of the AcrySof® IQ Toric IOL improves contrast sensitivity in low-light conditions.
Adverse Effects of the AcrySof® IQ
The adverse effect are similar with cataract surgery in general which include but not limited to: lens subluxation, corneal edema or endothelial damage, cystoid macular edema, infection, retinal detachment, vitreous loss, pupillary block, secondary glaucoma, iris prolapse, uveitis, and pupillary membrane. If the IOL rotates causing blurred vision as the astigmatism is not corrected, then on a rare occasion the lens has to be rotated back to the proper axis or degree.
The AcrySof® IQ toric intraocular is intended for use during cataract surgery in patients with astigmatism who wish to correct their astigmatism to decrease their dependence on glasses for distance vision. The results are excellent and approximately 95% of patients are able to see distance without wearing glasses.