fusional amplitude

fusional amplitude

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This is repeated three to five times in order to exercise and increase the fusional amplitude.
2) Orthoptic exercises are based around increasing either the fusional amplitudes or relative fusional vergence.
Among these oculomotor dysfunctions are reduced fusional amplitude ranges, abnormal vertical and lateral phorias, convergence insufficiency, diplopia with reduced recovery capability, fixation deficits, nystagmus, inadequate visual pursuit, reduced saccadic velocity, and accommodative deficiencies [3-7,10-11].
When the subject was unable to discriminate the location of the small square, the examiner gradually decreased the fusional amplitude demand until the subject regained fusion, as indicated by the subject's ability to discern the location of the small square again (i.
Here the sensitivity refers to the ability of the method to identify deficient positive fusional amplitude.
Previous studies have shown that fusional amplitude measurements increase as the stimulus size increases [47-48].
The fusional amplitude is defined as the range between the divergent and convergent break points of the fusional reserve measurement.
6) Which of the following statements about the fusional amplitude is TRUE?