Multifocal versus monofocal intraocular lenses after cataract extraction

Area of Science:

• Ophthalmology
• Biomedical Engineering

Background:

• Modern cataract surgery with intraocular lens (IOL) implantation typically restores unaided distance vision.
• Near vision often still requires corrective lenses, such as reading glasses.
• Multifocal IOLs offer the potential for improved vision at multiple distances, but their benefits versus optical compromises are debated.

Purpose of the Study:

• To evaluate the effectiveness of multifocal IOLs compared to standard monofocal IOLs.
• Assessed visual acuity, patient satisfaction, spectacle independence, and visual disturbances like glare and reduced contrast sensitivity.

Main Methods:

• Systematic review of randomized controlled trials comparing multifocal IOLs with monofocal IOLs.
• Searched major databases including Cochrane CENTRAL, MEDLINE, EMBASE, NRR, and PubMed.
• Included both unilateral and bilateral implantation studies; assessed trial quality and analyzed data statistically where possible.

Main Results:

• Unaided distance visual acuity was comparable between multifocal and monofocal IOL groups.
• Multifocal IOLs significantly improved unaided near vision and increased spectacle independence.
• Adverse effects reported with multifocal IOLs included reduced contrast sensitivity and glare (halos).

Conclusions:

• Multifocal IOLs effectively enhance near vision and reduce the need for glasses compared to monofocal IOLs.
• The decision to use multifocal IOLs depends on individual patient priorities regarding spectacle independence versus potential visual side effects.
• Patient motivation for spectacle independence is a key factor in choosing multifocal IOLs.