Multifocal vs Monofocal Lenses for Cataract Surgery: How to Choose

One of the most important decisions in cataract surgery is choosing the right intraocular lens (IOL) to replace your clouded natural lens. The IOL you select will determine your range of vision after surgery — from distance clarity for driving, to intermediate vision for computer work, to near vision for reading. Understanding the options available is essential for making an informed choice that matches your lifestyle.

Monofocal IOLs are the standard lens choice and are available on the NHS. They provide excellent clarity at a single fixed focal point — typically set for distance vision. The optical quality of modern monofocal lenses is outstanding, offering crisp, high-contrast vision with minimal visual disturbances. However, most patients with monofocal lenses will need reading glasses for close work and may need glasses for intermediate tasks like using a computer.

Multifocal IOLs incorporate concentric rings of varying optical power into the lens design, creating multiple focal points that allow vision at distance, intermediate, and near ranges simultaneously. Studies published in the Journal of Cataract and Refractive Surgery report that approximately 85-90% of multifocal IOL patients achieve spectacle independence for most daily activities. The trade-off is that some patients experience halos or glare around lights at night — particularly in the first few months — as the brain adapts to the new optical system.

Extended Depth of Focus (EDOF) lenses represent the latest advancement in IOL technology. Rather than creating discrete focal points, EDOF lenses elongate the single focus point to create a continuous range of vision from distance through to intermediate. They produce fewer halos and glare than traditional multifocals while still reducing dependence on glasses. Near vision is improved compared to monofocal lenses, though reading glasses may still be needed for very small print or prolonged close work.

Toric IOLs are designed specifically for patients with significant corneal astigmatism — a condition where the cornea is shaped more like a rugby ball than a football, causing blurred or distorted vision at all distances. Toric lenses correct this astigmatism at the time of surgery, and are available in monofocal, multifocal, and EDOF variants. Without a toric lens, patients with astigmatism would still need glasses to correct the residual distortion after cataract surgery.

How do you decide which lens is right for you? Miss Tina Khanam takes a personalised approach to lens selection, considering your occupation, hobbies, driving habits, reading preferences, and tolerance for minor visual side effects. A patient who drives frequently at night may prioritise minimising glare (favouring a monofocal or EDOF lens), while a patient who wants freedom from glasses for travel and sport may prefer a multifocal.

Pre-operative biometry — precise measurement of eye length, corneal curvature, and anterior chamber depth — is critical for calculating the correct lens power. At K Vision Centre, we use the latest optical biometry technology to ensure the most accurate measurements possible, minimising the chance of a refractive surprise after surgery.

Monofocal cataract surgery at K Vision Centre starts from £2,750 per eye. Premium multifocal, EDOF, and toric lens options are available from £3,950 per eye. All options include the consultation, surgery, lens, and post-operative follow-up appointments. Interest-free finance is available to spread the cost.