The Different Cataract Surgery Lenses Explained

Cataract surgery is one of the most common and successful procedures performed worldwide. It restores clear vision by removing the cloudy lens of the eye and replacing it with a clear artificial intraocular lens (IOL).

There are several types of lenses available; Monofocal, Multifocal, Extended Depth of Focus (EDOF), Toric and Monovision. Each lens is designed to meet specific visual needs and lifestyle preferences. Choosing the right lens for you is an important part of planning for your cataract surgery.

Monofocal lenses: The standard option

Monofocal lenses are the most used IOLs. They are set to focus at a single distance, either near, intermediate, or far. Many patients opt to have them set for clear distance vision, which typically means needing reading glasses for near tasks. These lenses are reliable, covered by most healthcare systems and insurance providers, and provide excellent clarity at the chosen focal length.

Best for: Patients who are happy to continue wearing glasses for some tasks.

Multifocal lenses: for a range of distances

Multifocal IOLs are designed with multiple zones of focus, allowing patients to see well at different distances; near, intermediate, and far, without relying as heavily on glasses. While they can reduce the need for glasses, some patients may notice glare or halos around lights, particularly at night.

Best for: People who want greater independence from glasses in most day-to-day activities.

Extended depth of focus (EDOF) lenses: a middle ground

EDOF lenses create a continuous range of vision, usually from distance to intermediate (such as for driving or computer work), with some improvement in near vision. They tend to produce fewer issues with glare or halos than multifocal lenses, making them a good compromise between clarity and convenience.

Best for: Patients who want good vision for most activities and don’t mind using glasses occasionally for fine print or very close tasks.

Toric lenses: correcting astigmatism

For patients with astigmatism, toric lenses are an excellent choice. They are specifically designed to correct the uneven curvature of the cornea, which standard lenses cannot address. Toric lenses can be monofocal, multifocal, or EDOF, offering flexibility depending on visual needs.

Best for: Patients with astigmatism who want the sharpest possible vision after surgery.

Monovision: blending lens choices

Another option is monovision, where one eye is fitted with a lens for distance and the other for near vision. This approach can reduce dependence on glasses, but it does take some adjustment and may not suit everyone.

Best for: Patients who have successfully tried monovision with contact lenses or who are comfortable adapting to different visual inputs.

Choosing the right lens for you

The best lens depends on your lifestyle, hobbies, and priorities, whether that’s enjoying reading without glasses, driving safely at night, working comfortably on a computer, or reducing glare while playing sport. Your ophthalmologist will guide you through the options, considering your eye health, prescription, and personal goals.