AGE CHANGES IN VISUAL FUNCTION

视力下降是老年人普遍存在的问题。 老年人和最近的研究已经证明 一个独立而重要的物理贡献者 残疾和脆弱。年龄相关性视力丧失可能 由年龄和与年龄相关的病理引起的。这个 视力丧失的自然病史还没有得到很好的研究 与眼睛和其他器官发育的关系 病理学与正常视觉的鉴别 视力的老化和病理变化。此外， 人们很少注意到哪些因素可能 防止视力老化和哪些环境变化 当变化开始发生时，因素可以改变 随着他们的进步。 在BLSA中的研究旨在解决以下方面 这些与年龄相关的变化。 (1)自然史研究已经进行了很多年 几年来，已经有几项纵向研究 据报道。视力和双眼深度知觉是 对首次参加的参与者进行纵向测量 关于BLSA的女性参与者。以实验室为基础的 视觉对比敏感度的评估继续 管理，增加了在 至少两个指标超过一百个。 (2)中美关系新探 眼压和全身血压一直是 开发并已于1994年7月开始实施。这项研究将 确定血液中可能存在的种族和性别差异 眼压/眼内压关系和眼压 关系对视力的影响通过测量 视野的变化。

Deterioration of vision is a common problem in the elderly and in recent studies has been demonstrated to be an independent and important contributor to physical disability and frailty. Age associated loss of vision can result from aging and from age-associated pathology. The natural history of vision loss has not been well studied in relationship to the development of eye and other pathology and the differentiation between normal visual aging and pathological changes in vision. Furthermore, little attention has been given to what factors may prevent aging changes in vision and what environmental factors can be altered as the changes begin to occur and as they progress. Research in the BLSA has been designed to address aspects of these age associated changes. (1) Natural history studies have been done for many years, and several longitudinal studies have been reported. Visual acuity and binocular depth perception is measured on first time participants, and longitudinally on women participants in the BLSA. A laboratory based assessment of visual contrast sensitivity continues to be administered, increasing the number of persons with at least two measures to over a hundred. (2) A new study of the relationship between intraocular pressure and systemic blood pressure has been developed and has begun in July 1994. The study will identify possible racial and sex differences in blood pressure/intraocular pressure relationships and the effect of the relationship on vision as measured by changes in the visual field.