老年人是人口增长最快的群体，65岁以上的美国人超过4900万。随着超过10000名婴儿潮一代每天都要年满65岁，本文件已从2017年的版本扩展到住房和高级护理设施以外的领域，如办公室、酒店、医疗保健、商业空间和集会场所。40岁以上的人口约为8900万人；其中63%的人有视力问题。然而，在普通老年人群中，低视力的患病率很高，70岁以后，低视力急剧增加。低视力被定义为视力受损，视力较好的视力比20/60更差，无法通过医学、手术或传统眼镜矫正。人们依靠支持性的视觉环境来最大限度地提高独立性和安全性。本文件中提供的指南旨在为广泛的用户服务，包括个人、设计专业人士、商业建筑的业主和经理、法规和监管机构以及立法机构。

Older adults represent the fastest growing segment of the population, with over 49 million Americans over 65. With over 10,000 Baby Boomers turning 65 everyday, this document has been expanded from the 2017 version to include areas beyond housing and senior care facilities, such as offices, hospitality, healthcare, commercial spaces, and places of assembly. The over-40 population represents approximately 89 million people; of those, 63 percent have vision problems. However, there is a prevalence of low vision in the general senior population, which increases dramatically after the age of 70. Low vision is defined as vision impairment that is worse than 20/60 in the better eye and which cannot be correctable medically, surgically, or with conventional eyeglasses. People rely on a supportive visual environment to maximize their independence and safety. The guidance provided in this document is intended to serve a wide range of users, including individuals, design professionals, owners and managers of commercial buildings, code and regulatory agencies, and legislative bodies.