The relations between a decline of facial muscular strength by the softening of foods and a decline of vision

日本年轻人的视力在这40年以上的时间里呈下降趋势，平均视力最大值现在是5 ~ 6岁。提出了导致视力下降的原因之一是面部肌肉力量的下降，笔者试图测量幼儿园儿童的视力和视力，并通过问卷调查询问他们的饮食生活。用自动屈光仪测量儿童视力，用牙前压法测量闭牙力，并对闭牙力、闭牙面积、闭牙压力和左右闭牙平衡进行了讨论。大多数5 ~ 6岁的儿童有乳牙，但也有许多病例没有牙齿磨损。这意味着它们的食物生活是在软食物上进行的，它们的渗透力分布在480N到6N之间。不论最大年龄有多大差异，两组的视敏度和视力分布无明显差异。在食品硬度的感官评价中，豆腐是典型的软质食品。但是，有些孩子认为它是一种硬度一般的食物。提示断奶后他们的饮食生活出现了很多问题。我们必须关注婴儿生活中预防视力和视力下降的方法。

Visual acuity of young Japanese is decreasing for these 40 years or more, and the maximum of mean value of the vision is now 5 to 6 years of age. It has suggested that one of the cause of the decline is a decline of facial muscular strength, and the author tried to measured the vision and the occulusal force of kindergarden children, and also asked their food life by the questionnaire.The vision of the children were measured by the auto-refractometer and the occulusal force were mesured by the dental presucale method, and occulusal force, area of occulusion, occulusal pressure and the occulusal balance of right and left are discussed.The most of the children aged 5 to 6 years have milk teeth, but there were many cases who have no dental abrasion. It means that their food life is carried on the soft food, and their occulusal force have been distributed between 480N and 6N.Regardless of two years age difference at the maximum, there were no differences at the distributuion of the visuaal acuity and occulusal force. In the sensual evaluation of the hardness of the foods, TOFU was the typical soft food. But, some children evaluated it as a food with usual hardness. It suggest that there are many problems in their food life after the weaning. We have to concern the method of the prevention of a decline of vision and occulusal force in the infant life.