Multifocal PCIOLs
 Have rings of different optical power that bring near and far objects into focus simultaneously. The brain automatically zeroes in on the image that you are trying to see. This type of lens was among the first to be approved by the FDA. The Advanced Medical Optics ReZoom lens and the Alcon ReSTOR lens are examples of multifocal lenses (Figures).
Click here and then select "How a multifocal IOL works."
The AcrySof ReSTOR lens by Alcon Laboratories:
FDA approved multifocal lens. In multi-center clinical studies conducted in the United States and Europe, a total of 566 patients received the lens.
Frequency Patients Using Glasses with ReStor Lenses Implanted in Both Eyes: Distance Vision
| None of the time |
Some of the time |
Half of the time |
Most of the time |
All of the time |
| 92.9% |
2.9% |
1.4% |
1.4% |
1.4% |
Frequency of Patients Using Glasses with ReStor Lenses Implanted in Both Eyes: Near Vision
| None of the time |
Some of the time |
Half of the time |
Most of the time |
All of the time |
| 80% |
15.7% |
0% |
0% |
4.3% |
Overall Frequency of Using Glasses for Patients with Restor Lenses Implanted in Both Eyes
| Never |
Sometimes |
Always |
| 75.7% |
21.4% |
2.9% |
Visual Disturbances, 6 Months After Implantation of a Lens in the Second Eye
| Visual Disturbance |
Moderate |
Severe |
| Glare/Flare |
23.2 |
4.3 |
| Problems with Night Vision |
10.1 |
2.9 |
| Halos |
23.2 |
7.2 |
Patient Vision Satisfaction Without Glasses With ReStor Lenses Implanted in Both Eyes
Satisfaction with vision was measured on a continuous scale of 0-4 where 0 equated
to "not at all satisfied" and 4 equated to "completely satisfied."
| Overall |
3.4 |
| Day Vision |
3.5 |
| Night Vision |
3.2 |
Source: U.S. FDA, Summary of Safety and Effectiveness Data,
http://www.fda.gov/cdrh/pdf4/p040020b.pdf
- In some cases, the ReStor is used in an “off label” capacity to reduce the need for spectacles in patients who have not yet developed cataracts
The ReZoom Multifocal Intraocular Lens by AMO
FDA trials were not required for the ReZoom multifocal intraocular lens because it was based on a previously approved lens designs. However, information provided by the manufacturer indicates the following:
- 92 pecent of patients reported either "never" or "occasionally needing to wear glasses
- 81 percent of subjects reported that they were able to function without glasses comfortably at near distances
- 92 percent of subjects reported that they were able to function without glasses comfortably at intermediate distances
- 93 percent of subjects reported that they were able to function without glasses comfortably at far distances
- In some cases, the ReZoom is used in an “off label” capacity to reduce the need for spectacles in patients who have not yet developed cataracts
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