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Intraocular lens implants

Understand the lens choices used in cataract surgery, and the limits to discuss with your surgeon.

A new lens for your eye

During cataract surgery, the clouded lens is removed and replaced with a clear implant.

The lens type affects how you see at different distances and how much you may need glasses. The choice is made with your surgeon after an eye examination.

How cataract surgery works

A clear, foldable lens implant held by fine forceps

Lens choices and limitations

These are general categories. An examination is needed to discuss which option may suit your eye.

Monofocal

Clear at one distance, usually far

Reading glasses are usually still needed

The most common choice, with the fewest night-time side effects.

Toric

Clear at one distance, and corrects astigmatism

Reading glasses are usually still needed

For eyes with astigmatism, which blurs vision at every distance.

Multifocal or extended depth of focus

A range of distances, from far to near

Many people need glasses less often

Some people notice halos around lights at night, especially at first.

Planning your lens implant

Measured for your eye
The lens power is calculated from measurements of your own eye.
Folded to fit
Soft acrylic lenses fold to pass through the small opening, then unfold inside.
Some glasses may remain
A small leftover prescription is sometimes unavoidable, or planned on purpose.

Eye measurements help your surgeon calculate the lens power. They are part of the assessment, alongside your eye health and daily needs.

How your eye is measured

Will glasses still be needed?

It depends on the lens you choose. With a monofocal lens most people still need reading glasses.

Discuss the distances that matter to you and possible night-time visual effects before you decide.

Start with an examination

Your surgeon can explain which treatments may suit your eyes. This information does not replace an individual assessment.

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