Multifocal Intraocular Lenses (mIOL’s)
Multifocal Intraocular Lenses (mIOL’s) employ new technology to mimic the process of accommodation – they are sometimes called pseudoaccommodative IOL’s.
They create focal points for light coming from far, intermediate and near objects – but the patient only sees the object of interest.
It is not usual to implant a monofocal IOL in one eye and a multifocal IOL in the other. The eyes most commonly receive the same kind of lens, although each case is treated individually and each patient is advised with their best interests in mind. Depending on an individual patient’s requirements, the same mIOL may be used for both eyes or a “mix-and-match” approach to mIOL implantation may be advised. [
The lines on the lens mark the axis of astigmatism correction. This allows the surgeon to place the lens in exactly the correct orientation in the eye that allows patients to enjoy their full visual potential without glasses: Far and Near.
|% Totally free of spectacles||% Severe glare||% Severe halos||% Who would have the same lens implanted again|
|Monofocal IOL||10||Severe: up to 0.7%
Moderate: up to 5%
Moderate: up to 2.5%
|mIOL||75 – 85||0 – 8.5||4||95|
Chiam PJT et al. Journal of Cataract and Refractive Surgery 2006; 32: 1459-1463
Wolffe M et al. Eye 2006 Aug 25 [Epub]
A small proportion of patients (between 0 and 2% in different studies) have experienced symptoms of such severity that they have requested the mIOL be removed.