通用设计是一个“大帐篷”术语，包括更熟悉的方法，如可访问性和“无障碍”设计。如果设计是通用的 – 意味着每个人的设计 – 根据定义，它是可访问的。在建筑环境中，可达性意味着设计的空间，满足具有各种能力的人的需求，包括盲人或视力有限和相关认知困难的人。如果目标是通用设计，那么每个人都将得到满足。在加利福尼亚州山景城的GoogleX实验室外乘坐最新版Google自动驾驶汽车前的盲人。功能性视力包括两个方面：（1）视力，或中心视力的校正使用，以查看面部特征或字母数字符号等细节; （2）视野，或识别中心视野周围或周围物体的范围和能力。此外，深度感知和对比敏感度可以是相关的视力问题。视力能力差异很大。视力障碍是一个包罗万象的术语，包括任何视力不足的人，戴隐形眼镜无法矫正。视觉障碍具有特定国家/地区法律的连续标识符。在美国，低视力和弱视是连续功能的一般术语，可能每周甚至每小时甚至一小时不等。
Universal design is a “big tent” term that includes more familiar methods such as accessibility and “accessibility” design. If the design is generic – means everyone’s design – by definition, it is accessible. In the built environment, accessibility means design space that meets the needs of people with a variety of abilities, including blind people or people with limited vision and related cognitive difficulties. If the goal is a universal design, everyone will be satisfied. Take the blind before the latest version of Google’s self-driving car outside the GoogleX Lab in Mountain View, California. Functional vision includes two aspects: (1) vision, or correction of central vision to view details such as facial features or alphanumeric symbols; (2) visual field, or the extent and ability to identify objects around or around the central field of view. In addition, depth perception and contrast sensitivity can be related vision problems. Visual ability varies widely. Visual impairment is an all-encompassing term that includes anyone with insufficient vision and can’t correct contact lenses. Visual impairments have a contiguous identifier for the laws of a particular country. In the United States, low vision and amblyopia are general terms of continuous function, which may vary from week to week or even hour to hour.