Assessment of amplitude of accommodation (AA) in Owerri Municipal Council, Southeast, Nigeria - Ophthalmology & Vision Research

When fixation changes from far to near, the crystalline lens varies its focal length (refractive power) in response to changes in the vergence of the incident light. This process is known as accommodation. Amplitude of accommodation (AA) is the maximum refractive power the eyes can exert. It refers to a certain range of object distances for which the retinal image is as sharply focused as possible [1]. It remains a very important parameter in the diagnosis and treatment of accommodative anomalies, as well as the determination of reading addition of presbyopes. Accommodative anomalies are among the most common visual disorders, and they may be associated with symptoms, such as headache, asthenopia, pain in the eye, occasional diplopia, intermittent blurred vision, and swimming of print while reading [2].

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