This Article  • Full text PDF  • Reply to article  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Citing articles on Web of Science (2)  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

Paul C. Squires, Ph.D.
Human Engineering Branch Medical Research Laboratory U. S. Naval Submarine Base New London, Conn.

AMA Arch Ophthalmol. 1957;57(2):312-314.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor:

—Replying to Drs. Shipley and Walker, I wish briefly to say:

1. Shipley and Walker claim that work done in the darkroom alleys cannot be said to have been carried out under scotopic conditions.
   Reply: Unquestionably, points of light in a darkroom are perceived by the foveal cones, but a few points of light in a wholly dark surround do not prevent scotopic adaptation (the stars are seen at night with dark-adapted eyes). Therefore, experiments with darkroom alleys involve foveal (cone) perception by eyes which are in a state of scotopic adaptation—a complex which has not been sufficiently examined by darkroom experimenters. However, I have no objection to using the term darkroom alleys and have in general used this term in my article.
   
2. Shipley and Walker claim I conclude that the white lighted and darkroom alleys give the same results.
   Reply: Nowhere do I conclude that
   

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?