Optical Quality Assessment in Patients with Unilateral Congenital Ptosis: A Matched Case-Control Study

Table 3

Comparison of the OQAS parameters between the ptosis group and the normal group.

	Ptosis group	Normal group	Value
OSI	2.32 ± 2.36	0.61 ± 0.45	0.003^b
MTF	23.07 ± 14.09	41.09 ± 10.13	0.001^a
SR	0.14 ± 0.07	0.21 ± 0.08	0.019^a
OV100%	0.77 ± 0.49	1.37 ± 0.36	＜0.001^a
OV20%	0.55 ± 0.34	0.99 ± 0.30	0.003^b
OV9%	0.34 ± 0.19	0.60 ± 0.19	0.001^a

a: paired t-tests; b: Wilcoxon signed-rank tests; statistical significance ; MTF: modulation transfer function; SR: Strehl ratio; OSI: objective scatter index; OV: Optical Quality Analysis System Value; OQAS: Optical Quality Analysis System.