Vergence and Accommodative Dysfunctions in Emmetropic and Myopic Chinese Young Adults

Table 4

Mean values of various binocular vision and accommodation test results by refractive error groups.

	Emmetropes	Low myopes	Moderate myopes	High myopes	Total
Distance positive fusional vergence break point, △, mean ± SD	19.9 ± 6.1	18.7 ± 6.5	22.3 ± 6.3	21.2 ± 6.7	20.1 ± 6.5
Distance negative fusional vergence break point, △, mean ± SD	11.7 ± 4.2	12.7 ± 3.7	12.8 ± 4.6	12.6 ± 3.9	12.3 ± 4.0
Near positive fusional vergence break point, △, mean ± SD	25.8 ± 7.7	25.7 ± 7.1	27.6 ± 8.3	28.2 ± 8.4	26.3 ± 7.9
Near negative fusional vergence break point, △, mean ± SD	21.4 ± 5.2	21.1 ± 5.4	22.1 ± 5.3	24.0 ± 6.0	21.8 ± 5.6
Vergence facility, cycles per minute, mean ± SD	16.0 ± 4.3	15.4 ± 4.0	16.5 ± 3.9	15.4 ± 3.0	15.6 ± 3.9
Monocular accommodative amplitude (right eye only), dioptre, mean ± SD	9.5 ± 2.5	8.8 ± 2.2	9.6 ± 2.0	10.0 ± 2.2	9.1 ± 2.2
Monocular accommodative facility (right eye only), cycles per minute, mean ± SD	14.2 ± 3.7	13.9 ± 3.7	14.6 ± 3.9	14.6 ± 4.3	14.3 ± 4.0
Near point of convergence break point, cm, mean ± SD	6.2 ± 2.7	6.5 ± 3.7	5.9 ± 2.8	5.8 ± 3.4	6.3 ± 3.2