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Presbyopia is the hardening of the [[lens]] in the [[eyeballs]] such that it becomes difficult to see [[near work]]. This is common in older adults and is commonly treated with [[reading glasses]] or [[bifocals]]. | Presbyopia is the hardening of the [[lens]] in the [[eyeballs]] such that it becomes difficult to see [[near work]]. This is common in older adults and is commonly treated with [[reading glasses]] (reduced minus for myopes), progressive lenses, or [[bifocals]]. | ||
==Correction== | |||
As you age, the lens in your eye becomes less flexible. This makes [[accommodation]] more difficult and brings on "arms are not long enough to read" symptoms. Someone may be both [[myopic]] and presbyopic, and have deficits in both near and far vision. Your [[Prescription]] will have an "Add" section specifying bifocals or multifocals if you have diagnosed presbyopia, or if your doctor thinks it best to reduce eye strain. | |||
===Two glasses=== | |||
It is an option to have two pairs of glasses, one for close-up, and one for distance, instead of trying to combine both near and far corrections in one pair of glasses. | |||
===Bifocals=== | |||
Glasses with a lower section that is specifically for close work. | |||
===Progressive lenses=== | |||
Glasses with a gradient from zero to near plus addition spherical power from top to bottom. | |||
===Multifocals=== | |||
Contacts that have sections for near and far work, which the [[visual cortex]] will selectively use when looking at different distances. | |||
== Measuring == | == Measuring == | ||