近視（第6回）

Myopia

1．近視に関するわが教室の研究に対する質疑に答う

　始めから質問を行なつた。

山地：生理的トーヌスと病的トーヌスとの境は？

The 6 th Symposium on myopia convened on Nov. 11, 1967, as a collateral event of Annual Congress of Clinical Ophthalmology in Tokyo. The elongation of the ocular axis induced by sustained near work, which has been one of the most controversial themes in recent years, was discussed by numerous participants. A. Nakajima, Juntendo University, Tokyo, reported on hereditary factor in determinig upon the various refractive elements. Illumination re-lated to the etiology of "school myopia" was discussed by H. Kabayama, Tokyo Toshima Hospital.