Related Experiment Videos
Performance of diffractive multifocal intraocular lenses in extracapsular cataract surgery
L Rossetti1, F Carraro, M Rovati
1Department of Ophthalmology, University of Milan, Italy.
Journal of Cataract and Refractive Surgery
|March 1, 1994
Summary
Multifocal intraocular lenses (IOLs) offer improved near vision and spectacle independence after cataract surgery compared to monofocal IOLs, despite potential visual disturbances. Patient satisfaction with near vision was higher in the multifocal group.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Clinical Research
Background:
- Cataract extraction with intraocular lens (IOL) implantation is a common surgical procedure.
- Monofocal IOLs provide good distance vision but often require reading glasses.
- Multifocal IOLs aim to restore both distance and near vision, potentially reducing spectacle dependence.
Purpose of the Study:
- To compare the visual outcomes and patient satisfaction between monofocal and multifocal IOLs after extracapsular cataract extraction.
- To evaluate uncorrected and best-corrected visual acuities, spectacle independence, and contrast sensitivity.
- To assess patient-reported satisfaction with near vision and the occurrence of visual phenomena.
Main Methods:
- A prospective, randomized clinical trial involving 80 patients (42 monofocal IOL, 38 multifocal IOL).
- Patients were followed for 12 months post-surgery with examinations at three, six, and 12 months.
- Data collected included visual acuity (uncorrected and best-corrected), spectacle correction needs, patient satisfaction questionnaires, and contrast sensitivity measurements.
Main Results:
- Uncorrected visual acuity was similar between groups; however, near uncorrected visual acuity (J1-J2) was significantly better in the multifocal group (52% vs. 12%).
- Multifocal IOL recipients achieved greater spectacle independence (48% vs. 8% for monofocal).
- While multifocal patients reported higher satisfaction with near vision and more visual phenomena (glare, halos), overall satisfaction differences were not statistically significant. Contrast sensitivity was comparable between groups.
Conclusions:
- Multifocal IOLs enhance near visual function and reduce spectacle dependence following cataract surgery compared to monofocal IOLs.
- Patients receiving multifocal IOLs report greater satisfaction with their near vision, although they may experience more visual side effects.
- The choice between monofocal and multifocal IOLs should consider individual patient needs and expectations regarding visual outcomes and potential visual disturbances.