Multifocal & Trifocal IOLs: Distance, Intermediate and Near

How they work

Instead of focusing light at one point, these lenses use concentric optical zones or diffractive steps to create two (multifocal: distance + near) or three (trifocal: distance + intermediate + near) focal points. The brain learns to use the image that is in focus for the task at hand.

What they do well

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• Strong reduction in spectacle dependence across daily activities
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• Trifocals add the intermediate range — computer screens, car dashboards, cooking — that older bifocal designs missed
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• Toric versions simultaneously correct corneal astigmatism
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The trade-offs, plainly

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• Halos, glare or starbursts around lights at night — most noticeable early; most patients adapt over months, a few do not
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• Slightly reduced contrast in dim light compared with a monofocal
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• Very fine print or dim-light reading may still occasionally need weak readers
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• Results depend on a healthy cornea, macula and precise biometry — and on choosing patients who accept the trade-offs
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Selection is the procedure

These lenses reward careful selection and punish casual selection. Corneal shape and regularity, pupil behaviour, macular health and — just as much — your personality and priorities are all part of the decision. Compare all IOL types · Discuss your eyes.

Information on this page is for general education and does not replace an examination, diagnosis or personalised medical advice from a qualified eye-care professional.

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