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Presbyopia Correcting Lens Simulator

Standard, single focus lenses are often focused at distance during cataract surgery.  The depth of field of these lenses is low enough that near vision is blurred for certain purposes, especially reading.  Extended depth of focus lenses provide distance vision, as well as enough clarity to make many near tasks possible.  
The pictures below approximate the difference between standard intraocular lenses and multifocal or extended depth of focus lenses.    Your actual experience of depth of focus is affected by ambient lighting, pupil size, and the task at hand.

Standard Intraocular Lens

Near Image is reading distance

Far image is 60 feet away

Extended Depth of Field/Multifocal Lens

Near Image is reading distance

Far image is 60 feet away

An important side effect of extended depth of focus lenses is reduced contrast. This is simulated below:

Standard Intraocular Lens- Normal Contrast

Multifocal Lens- Reduced Contrast

Multifocal and extended depth of focus lenses will very likely improve your depth of field and decrease your dependence on glasses.  At the same time, you may experience unwanted side effects including loss of contrast, glare and halos.   Discuss both the desirable and undesirable effects of multifocal and extended depth of focus lenses with your surgical team.   Your personality, physique, pathology and predispositions (the 4 P's) may decide whether you want to opt for these lenses.

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