• Journal of Korean Ophthalmic Optics Society
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• v.13 no.1
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• pp.83-87
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• 2008

Purpose: This study was investigated for the effects of vision training on the phoria and positive fusion reverse (PFR) of patients with convergence insufficiency (C.I). Methods: Subjects were included 11 patients with CI of T Vision Center (5 patients with distance orthophoria, 6 patients with distance exophoria). The vision training of this study had been processed daily during an average of 2 months for each patients. Results: The result showed that after vision training, the phoria and PFR of CI patient were improved significantly than that before vision training (p<0.05) and when the groups were divided to the distance orthophoria convergence insufficiency (DOCI) group and distance exophoria convergence insufficiency (DE-CI) group, these improvements were proved similarly in the both groups. Conclusions: This study proved that vision training for patients with C.I was effective for the improvement of the phoria and PFR of these patients.

• Journal of Korean Ophthalmic Optics Society
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• v.10 no.3
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• pp.159-164
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• 2005

Accommodation and convergence is combination movement which is closely connected with each other. When one of them is stimulated, both of functions occur at the same time. Specially, the convergence by the accommodation's stimulation is called as accommodative convergence. That has excess or deficiency according to refraction state of eye. This study was performed by using both of Gradient method and Heterophoria method to 41 adults who have no any ophthalmic disease. 1. As the result of investigation about the distribution of heterophoria at distance, there were orthophoria of 5 subjects, exophoria of 32 and esophoria of 4. Exoporia occupied at the hightest rate. The distribution of heterophoria at near cover a wider range more than at distance. 2. When we measured the horizontal heterophoria amount in the state of relaxation of accommodation power of lens, exophoria amount increased in case of 38 subjects. 3. The person who has $4{\sim}6{\Delta}/D$ which conform to normal AC/A ratio occupied 27 subjects(66%) in Heterophoria method and 16(39%) in Gradient method, respectively.