The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.
To search for another term please use "Back to the list" to return to the main page or the e-ILV.
For the complete set of terms and definitions CIE S 017:2020 can be purchased from the CIE Webshop. Members of a CIE National Committee or Associate National Committee have access to a 66,7 % discount on the purchase price of the standard.
For advice on CIE Publications contact ciecb@cie.co.at. Please note that the CIE CB may not be able to assist with enquiries of technical nature.
field of vision
extent of space in which objects are visible to an eye in a given position
Note 1 to entry: In the horizontal plane meridian the field of vision extends to nearly 190° with both eyes open, the area seen binocularly is about 120°, and the area seen by one eye only is about 154°.
Note 2 to entry: The extent of the field of vision tends to diminish with age.
Note 3 to entry: This entry was numbered 17-430 in CIE S 017:2011.