Table 1.

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

Diagnosis/Schirmer’s	Patients	%	95% CI 4
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

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).

²Pre-DES: ≤5 mm on Schirmer’s test in either eye and not diagnosed as DES.

³Non-DES: >5 mm on Schirmer’s test in either eye and not diagnosed as DES.

⁴95% confidence interval based on binomial distribution was calculated with JMP ver. 10.0.2 (SAS Institute, Cary, NC, USA).