Abstract: A brief account is made of the purpose and significance of research onglare; explanations are made on the physiological and psychological effect ofglare and its influence on production as well as the four factors for evaluationof the degree of discomfort of glare. Mention is made of the arrangements ofequipments and conditions of experiment and the process of obtainingmathematical expressions for glare evaluation. Relational curve brightness ofthe source of glare vs background brightness and relational curve of the-solidangle subtended by the source of glare on the observer's eye vs angulardisplacement of the source from the observer's line of sight are presented.Comparisons have been made between all parameters of the Chinese formulawith those of other countries.

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