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. Author manuscript; available in PMC: 2010 Jun 1.
Published in final edited form as: Optom Vis Sci. 2009 Jun;86(6):572–576. doi: 10.1097/OPX.0b013e3181a72980

Figure 2.

Figure 2

Rod increment threshold functions on infants and adults. Horizontal lines: absolute threshold of each data set, which measures test sensitivity; sloping lines: regression lines fitted to the increment threshold data; dashed arrows: the measured field sensitivity, where the two solid lines cross. Gray curve: infant data predicted by an early-stage immaturity. A, 7-week-olds (white triangles) and adults (black circles), from ref. 20. B, 4-week-olds (diamonds), 10-week-olds (squares), 18-week-olds (triangles), and adults (black circles), from ref. 25.