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Much like adjusting the focus on a camera in a health eye the lens flexes and changes
shape to properly focus on objects at different distances. However, as your eyes age they
lose their ability to flex. The result is diminished up close vision. This is called
Presbyopia. Presbyopia is a natural part of ageing. Patients who have had LASIK earlier
in their lives should know that their treatment isn't wearing off but the crystalline lens
isn't allowing them to continue to see images up close the same way they used to.