Visual function after bilateral implantation of apodized diffractive multifocal IOL with a +3.0 or +4.0 D addition

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Optometry

Background:

• Cataract surgery often involves multifocal intraocular lens (IOL) implantation to restore vision at multiple distances.
• AcrySof ReSTOR IOLs are designed to address presbyopia and visual deficits post-cataract surgery.
• Evaluating specific IOL models, such as SN6AD1 and SN6AD3, is crucial for optimizing patient outcomes.

Purpose of the Study:

• To compare the visual performance of two AcrySof ReSTOR multifocal IOL models: SN6AD1 and SN6AD3.
• To assess uncorrected visual acuity (VA) at distance, intermediate, and near, along with stereoacuity and reading parameters.
• To determine patient-preferred reading distances and reading speeds with each IOL type.

Main Methods:

• Prospective study involving 40 patients (80 eyes) undergoing bilateral IOL implantation.
• Patients were assigned to either the SN6AD1 or SN6AD3 IOL group (20 patients per group).
• Postoperative evaluations at 3 months included uncorrected VA (distance, intermediate, near), stereoacuity, reading distance, and speed under various contrast conditions.

Main Results:

• The SN6AD1 IOL group demonstrated significantly better uncorrected intermediate VA at multiple distances and contrast levels (P < .05).
• No significant differences were observed between the groups for uncorrected distance or near VA (P > .05).
• Preferred reading distances were 38.5 cm (SN6AD1) and 32.8 cm (SN6AD3); stereoacuity and reading speed showed no significant differences.

Conclusions:

• The SN6AD1 IOL provides superior intermediate visual acuity and a more comfortable reading distance compared to the SN6AD3 IOL.
• Both IOL models maintain comparable uncorrected distance and near visual acuity, stereoacuity, and reading speed.
• The SN6AD1 IOL may be preferred for patients prioritizing intermediate vision and reading comfort after cataract surgery.