Definition of Presbyopia Presbyopia is a condition in which the
lens of the eye loses its ability to focus, making it difficult
to see objects up close. Causes, incidence, and risk factors The
lens of the eye needs to change its length or shape to focus on
smaller objects, or objects that get closer or farther away.
This is called the elasticity of the lens. This elasticity is
slowly lost as people age. The result is a slow decrease in the
ability of the eye to focus on nearby objects. Signs and tests
The health care provider will perform a general eye examination,
including measurements to determine a prescription for glasses
or contact lenses. There is no cure for presbyopia, but it can
be corrected with glasses or contact lenses. In some cases,
adding bifocals to an existing lens prescription is enough. As
the ability to focus up close worsens, the bifocal prescription
needs to be changed. Vision can be corrected with glasses or
contact lenses. Linda J. Vorvick, MD, Medical Director, MEDEX
Northwest Divisi