Table 2.

Summary of Statistical Analyses Showing Correlation Between Cone Spacing and Visual Function

Variable	Spearman Rank Correlation ρ	P Value	Cones Below Average, % (95% CI)
VA ETDRS score
For <85 letters, 20/20 VA	−0.60	0.003	24.82 (1.77–43.59)
For <80 letters, 20/25 VA			51.75 (34.16–65.83)
Foveal sensitivity
Logarithmic	−0.47	0.017	51.66 (17.90–67.27)
Linear	−0.47	0.017	61.85 (46.58–69.90)

Foveal sensitivities are in logarithmic (decibel) and linear (1/Lambert) scales. P < 0.05 is statistically significant. The Cones Below Average column demonstrates that upper limits of cone density change before abnormal values were observed for ETDRS acuity (<85 letters and <80 letters) and foveal sensitivity (<35 dB and <3162.28 1/Lambert).