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Table 1 LASIK patients grouped according to dry eye syndrome (DES) and Schirmer’s test values prior to surgery

From: Dry eye in LASIK patients

Diagnosis/Schirmer’s Patients % 95% CI4
DES 1 /≤ 5 mm 19 2 1.3 – 3.1
DES/>5 mm 39 4 3.0 – 5.6
Pre-DES 2 /≤ 5 mm 235 25 22.2 – 27.6
Non-DES3/>5 mm 655 69 66.1 – 72.0
Total 948 100  
  1. 1DES was diagnosed in one or both eyes by a clinical ophthalmologist using: patient complaint, Schirmer’s reflex tear flow test, and fluorescein corneal surface staining (when appropriate).
  2. 2Pre-DES: ≤5 mm on Schirmer’s test in either eye and not diagnosed as DES.
  3. 3Non-DES: >5 mm on Schirmer’s test in either eye and not diagnosed as DES.
  4. 495% confidence interval based on binomial distribution was calculated with JMP ver. 10.0.2 (SAS Institute, Cary, NC, USA).