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Extended Depth of Focus
Extended depth of focus lenses are another strategy to lessen dependence on reading glasses. These lenses are similar to monofocal lenses in that they have a single zone of best vision without glasses, however, there have been optical modifications to extend or stretch the depth of focus to about an arm's length. This is computer range or larger print materials. This would not be more intricate activities such as threading a needle or tying fly's or reading the phone book. |
