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. Author manuscript; available in PMC: 2015 Feb 19.
Published in final edited form as: Adv Exp Med Biol. 2014;801:309–316. doi: 10.1007/978-1-4614-3209-8_39

Fig. 39.3.

Fig. 39.3

A cone density map marked to demonstrate the regions analyzed in this study. Quadrants are labeled by letter (N = nasal, S = superior, T = temporal, I = inferior). The white circles represent eccentricity increments of 1 degree, and the black circles outline the annulus between 1.5 to 3.1 degrees. b The cone density versus retinal eccentricity in each quadrant for one animal. For the superior quadrant, the region of valid data ended at 3.5 degrees. c The cone density trend shows a slight, although not significant (p = 0.1669), decrease with age. Each point represents the average cone density in the 1.5–3.1 degree annulus for one of the 20 subjects