Contrast Sensitivity of Thyroid Associated Ophthalmopathy Patients without Obvious Optic Neuropathy

Table 2

Comparison of contrast sensitivity functions between TAO patients and controls in 5 different spatial frequencies.

Frequency	TAO patients; Mean ± SD; (min–max)	Controls; Mean ± SD; (min–max)	P
A	6.47±1.08; (5–8)	6.97±0.73; (6–8)	.039
B	6.17±0.95; (4–8)	7.07±0.61; (6–8)	<.001
C	6.00±1.08; (2–8)	7.00±0.64; (6–8)	<.001
D	4.65±1.42; (1–7)	6.32±0.85; (5–8)	<.001
E	3.62±1.79; (1–7)	5.22±1.56; (2–8)	<.001

TAO: thyroid associated ophthalmopathy.
SD: standard deviation.
Letters indicate different spatial frequencies in FACT: 1.5 (A), 3 (B), 6 (C), 12 (D), and 18 (E) cycles per degree.