Comparative visual performance with monofocal and multifocal intraocular lenses

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Vision Science

Background:

• Cataract surgery commonly involves intraocular lens (IOL) implantation.
• Monofocal and multifocal IOLs offer different visual outcomes.
• Patient satisfaction depends on achieving desired visual acuity at various distances.

Purpose of the Study:

• To compare visual performance and quality of vision between monofocal and apodized diffractive multifocal intraocular lenses (IOLs).
• To evaluate subjective visual outcomes for near, intermediate, and distance vision after binocular IOL implantation.

Main Methods:

• 94 patients were evaluated 3-8 months post-surgery.
• Visual acuity and quality of vision were assessed using subjective questionnaires.
• Tested IOLs included an aspheric monofocal and two apodized diffractive multifocal IOLs (ReSTOR® +2.5 D and +3.0 D).

Main Results:

• ReSTOR® +2.5 D IOL showed better near and intermediate vision than monofocal IOL.
• Near vision with +2.5 D was slightly lower than +3.0 D; intermediate vision was similar.
• Visual acuity at preferred reading distance was equal for multifocal IOLs, worse for monofocal.
• Quality of vision was highest for monofocal IOL, similar between multifocal IOLs.

Conclusions:

• ReSTOR® +2.5 D IOL provides functional near and good intermediate vision, balancing patient needs.
• It offers more near vision than monofocal IOLs without the visual disturbances of +3.0 D multifocal IOLs.
• No significant difference in quality of vision between multifocal IOLs; patient self-selection may influence results.