Long-term experience with mixing and matching refractive array and diffractive CeeOn multifocal intraocular lenses

Area of Science:

• Ophthalmology
• Biomedical Engineering

Background:

• Multifocal intraocular lenses (IOLs) are used to correct vision after cataract surgery.
• Both diffractive and refractive IOL designs aim to provide clear vision at multiple distances.

Purpose of the Study:

• To compare the visual performance of the Array SA40N (refractive) and CeeOn 811E (diffractive) multifocal IOLs.
• To evaluate the benefits of combining both types of multifocal IOLs in the same patient.

Main Methods:

• Three groups of cataract patients (n=10 each) were studied: unilateral CeeOn, unilateral Array, and bilateral mix-and-match.
• Postoperative assessments included visual acuity, spectacle independence, depth of focus, contrast sensitivity, and patient satisfaction.

Main Results:

• The CeeOn diffractive IOL provided better uncorrected near vision, while the Array refractive IOL offered better intermediate vision.
• The mix-and-match group showed superior overall performance, particularly for intermediate distances, with 90% spectacle independence.
• Contrast sensitivity in the mix-and-match group was comparable to phakic controls, unlike individual IOL groups.

Conclusions:

• Bilateral implantation of one diffractive and one refractive multifocal IOL is safe.
• This combined approach enhances intermediate vision, depth of focus, and contrast sensitivity.
• The mix-and-match strategy significantly reduces spectacle dependence in patients.