Table 4: Comparison of characteristics of vitreous floater symptoms according to the degree of discomfort.

Mild discomfort ()Moderate discomfort ()Severe discomfort () valuesa

Onset of discomfort, (%)0.046
 One or two days ago3 (15)06 (35)
 Within weeks1 (5)12 (50)4 (24)
 Within months2 (10)6 (25)0
 Several months ago9 (45)4 (17)3 (18)
 Several years ago5 (25)2 (8)4 (24)
Daily frequency of discomfort, (%)<0.001
 ≤17 (35)02 (12)
 2~38 (40)6 (25)0
 4~91 (5)9 (38)4 (24)
 ≥104 (20)9 (38)11 (65)
Discomfort severity change, (%)0.017
 Getting better9 (45)2 (8)2 (12)
 Stationary9 (45)13 (54)10 (59)
 Getting worse2 (10)9 (38)5 (29)
Floater type, (%)0.006
 1–3 floaters11 (55)7 (29)4 (24)
 3–10 floaters9 (45)10 (42)7 (41)
 >10 floaters05 (21)2 (12)
 A curtain or cloud02 (8)4 (24)
Daily frequency of photopsia, (%)0.002
 ≤119 (95)22 (92)9 (53)
 2~302 (8)5 (29)
 4~9002 (12)
 ≥101 (5)01 (6)

aCuzick’s Wilcoxon-type nonparametric trend test.