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. Author manuscript; available in PMC: 2009 Sep 7.
Published in final edited form as: Vision Res. 2008 Jan 31;48(6):788–798. doi: 10.1016/j.visres.2007.12.011

Figure 3.

Figure 3

Critical distance in degrees (upper panels), representing the spatial extent of crowding and threshold elevation (lower panels) representing the peak magnitude of crowding are plotted for the four trigram conditions, for the non-amblyopic (left) and amblyopic eyes (right). Data for each observer are plotted as different colored symbols (red: strabismic observers; green: anisometropic observer; blue: strabismicanisometropic observer) and the group-averaged values (± 95% confidence intervals) are plotted as filled black circles. For comparison, data from the normal fovea (unfilled gray symbols) and periphery (10° eccentricity: filled gray symbols) are replotted from Chung et al (2007) as gray symbols, and the extent of crowding measured using stimuli close to size thresholds from Levi et al (2007) are replotted as small symbols. Dashed lines in the lower panels represent the null effect (no crowding).