1、1 Addendum C for ANSI/IES RP-16-10 Nomenclature and Definitions for Illuminating Engineering If you, as a user of ANSI/IES RP-16-10, believe you have located an error not covered by the following revisions, you should e-mail your information to Pat McGillicuddy, pmcgillicuddyies.org or send a letter
2、 to Pat McGillicuddy, Manager of Technology, IES, 120 Wall St. 17th Floor, New York, NY 10005. Additions will be posted to this list online as they become available. This erratum was last updated February 3, 2016. New text is in italic bold font. Deleted text has a strikethrough. Section 5.3.4 Gangl
3、ion Cells Some retinal ganglion cells are photosensing (melanopsin-containing) and are believed to may have a role in entraining the circadian clock as well as other hormonally-mediated effects. These cells do not contribute to are not believed to contribute to visual process perception. Section 5.9
4、.6.2 Visual Acuity A measure of the ability to distinguish fine details, usually measured with optotypesxi of different sizes when not constrained by contrast. Quantitatively, it is the reciprocal of the minimum angular size in minutes of arc of the critical detail of an object which can just be see
5、n resolved. (see 5.9.6.3 Resolving power) Section 5.9.12 Afterimage A visual response that occurs after the stimulus causing it has ceased. The effect is due to retinal photopigment regenerating from a bleach. Afterimages can fade quickly because they are stabilized on the retina (Troxler Effect), b
6、ut the reduction in sensitivity of the afterimage area continues until the photopigment is regenerated. (See 5.9.20 Troxler Effect) Section 5.9.20 Troxler Effect A fading of visual perception because of a stabilized retinal image. For example, we normally do not see the retinal blood vessels which lie in front of the retina because they are fixed relative to the retinal receptors. xi Test type for determining visual acuity.
