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Table 3 Summary of clinical and refractive findings in ptotic eyes with/without amblyopia in the data from ptotic eyes before ptosis repair surgery

From: Refractive error characteristics in patients with congenital blepharoptosis before and after ptosis repair surgery

Results for individual ptosis Ptotic eye without amblyopia Ptotic eye with amblyopia P value
Number of eyes 53 14  
Ptosis severity    0.18
 Mild (MRD1 ≥ 2 mm) 3 (5.7 %) 3 (21.4 %)
 Moderate (0 ≤ MRD < 2 mm) 33 (62.3 %) 7 (50.0 %)
 Severe (MRD1 < 0 mm) 17 (32.0 %) 4 (28.6 %)
Spherical equivalent refraction (number %)    0.01*
 ≥ − 1.00 D 42 (79.2 %) 6 (42.9 %)
 < −1.00 D 11 (20.8 %) 8 (57.1 %)
Astigmatism
 Mean ± SD −1.37 ± 1.20 −1.92 ± 1.73 0.09
 ≤ − 1.50 DC (number, %) 22 (41.5 %) 10 (71.4 %) 0.04*
Oblique astigmatism (number, %) 14 (25.9 %) 8 (57.1 %) 0.03*
Refractive type    0.01*
 Hyperopia 9 1  
 Myopia 11 8
 Emmetropia 33 5
  1. MRD1 marginal reflex distance 1
  2. *Chi-Square test, P < 0.05 means statistically significant