[Heterophoria and effect of plus lens on it in juvenile myopes].

OBJECTIVE

To study the heterophoria and effect of plus lens on it in juvenile myopes.

METHODS

The amount of heterophoria on near (33 cm) fixation was respectively determined without and with correcting spectacles, and with correcting spectacles combined with an additional + 1.50 D lens in 151 students with different refractive state.

RESULTS

It was liable to have exophoria in the myopic group without correcting lens. The amount of exophoria declined with correcting lens, and it increased again when a + 1.50 D lens was added to the correction.

CONCLUSIONS

From the viewpoint of the coordination between accommodation and convergence, it is indicated that juvenile myopes generally should wear correcting spectacles, and be careful to use plus lens.