Monofocal or unifocal’s
With monofocal lenses, your vision is typically in focus at only one distance – near, intermediate or far preferably FAR. Most people who choose monofocals have their IOLs set for distance vision and use reading glasses for near activities. On the other hand, a person whose IOLs were set to correct near vision would need glasses to see distant objects clearly.
Monofocal Toric IOL’s
This is a monofocal IOL with astigmatic correction built into the lens.
This eye condition distorts or blurs the ability to see both near and distant objects. With astigmatism the cornea (the clear front window of the eye) is not round and smooth (like a basketball), but instead is curved like a football. People with significant degrees of astigmatism are usually most satisfied with toric IOLs.
These newer IOL types reduce the dependence on glasses or contact lenses for most of the daily tasks.
In the multifocal type, a series of focal zones or rings is designed into the IOL. Depending on where incoming light focuses through the zones, the person may be able to see both near and distant objects clearly. Multifocal lens implants offer the convenience of less dependence on reading glasses compared to standard lens implants. People with good natural distance vision often go without eyeglasses when outdoors or around the house. However, when they need to see something up close – even for just a moment – they often have to find and put on their reading glasses. Examples of common momentary near tasks would be a looking at a cell phone, a photo, a menu, a boarding pass, an envelope address, a handwritten note, or a price tag.