Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2016 May 20;8:103–111. doi: 10.2147/EB.S95021

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2016 Moskowitz et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

PMC Copyright notice

Rod-mediated spatial summation.

Notes: (A) D_CRIT values in severe ROP, mild ROP, no ROP, and term-born control groups are plotted. Each point represents an individual subject; the number of subjects in each group is indicated. The horizontal bars indicate the mean D_CRIT value for each group. (B) The log–log plot demonstrates that reciprocity held. In every subject group, for the smaller spots, threshold became lower (more sensitive) with increasing stimulus area. For larger diameter spots, the threshold did not change; summation was complete. (A) Copyright © 2014. Association for Research in Vision and Ophthalmology. Adapted from Hansen RM, Tavormina JL, Moskowitz A, Fulton AB. Effect of retinopathy of prematurity on scotopic spatial summation. Invest Ophthalmol Vis Sci. 2014;55(5):3311–3313.²⁷

Abbreviations: D_CRIT, critical diameter; ROP, retinopathy of prematurity.