Conceptualization and Measurement of Physiologic Health for Adults

Vol. 12, Vision Impairment

by Randi S. Rubenstein, Kathleen N. Lohr, Robert H. Brook, George A. Goldberg


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The Health Insurance Study (HIS) will use data on impaired vision to study the relationship of health insurance to health status and quality of medical care. Impaired eyesight was selected as a health indicator because it is highly prevalent, easy to measure, and improvable in most cases. This report establishes criteria for measuring the prevalence and adverse effects of vision impairment and it defines criteria for evaluating medical care; it analyzes the data on prevalence and adverse effects among the HIS population; and it verifies that enrollee assignment to different health insurance plans had been random. A medical screening examination and a medical history questionnaire, both administered at the time of enrollment, provided data for this study. Results from the screening examination retesting for near and far vision confirmed that the HIS testing procedures were reliable.

This report is part of the RAND Corporation report series. The report was a product of the RAND Corporation from 1948 to 1993 that represented the principal publication documenting and transmitting RAND's major research findings and final research.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.