Table 2. Frequency of DESS symptoms (N = 328).

	Never		Occasionally		Often/always
	N	%	N	%	N	%
Vision-related symptoms
Blurred vision	85	25.9	135	41.2	108	32.9
Double vision	190	57.9	85	25.9	53	16.2
Difficulty focusing for near vision	120	36.6	127	38.7	81	24.7
Increased sensitivity to light	73	22.3	145	44.2	110	33.5
Colored halos around objects	153	46.6	89	27.1	86	26.2
The feeling of poor vision	103	31.4	136	41.5	89	27.1
Eye related symptoms
Eye pain	89	27.1	144	43.9	95	29.0
Heavy eyelids	153	46.6	86	26.2	89	27.1
Burning	106	32.3	127	38.7	95	29.0
Itching	105	32.0	122	37.2	101	30.8
Eye redness	139	42.4	108	32.9	81	24.7
Eye dryness	75	22.9	138	42.1	115	35.1
Frequent tear	151	46.0	104	31.7	73	22.3
Excessive blinking	144	43.9	119	36.3	65	19.8
The feeling of a foreign body	145	44.2	100	30.5	83	25.3
Headache	47	14.3	142	43.3	139	42.4
Total reported symptoms of DESS- n (%)
Sufferers	236 (72.0)
Non-sufferers	92 (28.0)