Dataset:  alzheimers_eyes.csv

Source: R.A. Armstrong (2013). "Statistical Guidelines for the Analysis
of Data Obtained from One or Both Eyes," Opthalmic & Physiological Optics,
Vol. 33, pp. 7-14.

Description: Results of an observational study of axon densities in
subjects' eyes. Whole plot factor is Condition (Normal/Alzheimers) and
sub-plot factor is eye (Right/Left).

Variables/Labels:
Subject ID   (subject)
Condition Group   (alz_grp)  1=Normal, 2=Alzheimers
Eye      (eye)    1=Right, 2=Left
Mean Axon Density per sample field   (axondens, in 2000 mu m^2)