IOL lenses are used to replace the crystalline lens during cataract surgery or to correct your optical prescription when standard laser procedures are not advisable. The standard monofocal, or single focus IOLs, have been around for some time. However, premium IOLs have been developed to reduce, though not eliminate, the need for spectacles. The standard Monofocal IOL provides clear vision at either distance, intermediate, or near -but not at all distances. A Toric IOL corrects blurred vision as a result of astigmatism. Because this IOL needs to be aligned accurately, there is a risk that glasses may be required for activities such as driving. Multifocal IOLs improve vision at more than one distance. Creating the multifocal effect is complex and uniquely developed for various modern IOL designs. However, they are made either with focussing (refracting) curves, light splitting (diffractive) zones or a combination of both. Light focussing or refractive multifocals focus light for far, intermediate and sometimes near vision. Diffractive intraocular lenses aim to optimise vision for far, intermediate and near distances and are often called trifocal lenses. Extended Depth of Focus IOLs also split (or diffract) light. However, they aim provide a continuous focus from distance to intermediate and partially at near. The choice of Modern IOL designs means that you can choose the optimal lens to fit with your lifestyle and needs. Refractive and Diffractive Extended Depth of Focus IOLs are more suitable for patients who spend greater time outdoors and on digital devices like a computer. However, reading glasses are usually required for prolonged close work and when reading small print. Trifocal lenses generally offer better reading vision compared to EDoF and Refractive IOLs. If you tend to do more night driving and are sensitive to haloes and starbursts, EDoF and Refractive IOLs are recommended as they cause minimal haloes around street lights and car headlights. Discussing your vision requirements, hobbies and lifestyle with your Ophthalmologist forms an essential part of establishing the most optimum IOL for you.