Presbyopia

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Source: Videos/video links – courtesy of www.geteyesmart.org; eye health information from the American Academy of Ophthalmology.

Presbyopia

Presbyopia is an age-related loss of the ability to see things that are near. Presbyopia usually begins in a patient’s 40s.1,2

This affects closeup tasks such as reading or working on the computer. Most people become presbyopic around the age of 40, even if they have never had a vision problem previously.2

People who were previously wearing eyeglasses or contact lenses for their myopia or hyperopia will also start to notice that their near vision blurs when they wear their usual eyeglasses or contact lenses.2

Presbyopia predominantly arises from a gradual thickening and loss of flexibility of the eye’s natural lens with age.1,2 As the lens stiffens, it is less able to focus up close.2 A patient with presbyopia is prescribed a ‘relative plus’ powered corrective lens (plus relative to their pre-presbyopia prescription).

For a person who, prior to developing presbyopia, already has myopia (nearsightedness) multifocal lenses can be prescribed, containing both an area of ‘minus’ power (to correct the myopia) as well as an area of “‘relative plus’ power to correct the presbyopia arising from age.1

References:
1. American Optometric Association. (2011). Optometric Clinical Practice Guideline – Care of the Patient With Presbyopia. (3rd ed.). St. Louis, MO: Mancil G. L. et al.
2. Bailey, G. (2017, August). Presbyopia. Retrieved January 16, 2018, from http://www.allaboutvision.com/conditions/presbyopia.htm

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