Table 3 Visual acuity distribution among the groups (number of cases).

From: Optimal timing of vitrectomy for severe mechanical ocular trauma: A retrospective observational study

  

≥20/40

20/50-20/100

19/100-5/200

4/200-LP*

NLP*

P value*

Total

9

11

26

15

1

 

Before surgery

Group A

0

1

2

16

1

0.740

Group B

0

2

1

19

3

Group C

0

1

0

15

1

After surgery

Group A

3

3

10

4

0

0.045**

Group B

5

5

12

3

0

Group C

1

3

4

8

1

  1. Abbreviation: LP, light perception; NLP, no light perception.
  2. *Group A: Vitrectomy was performed on the 1st–7th day upon injury.
  3. *Group B: Vitrectomy was performed on the 8th–14th day upon injury.
  4. *Group C: Vitrectomy was performed after 14 days upon injury.
  5. *P value: Chi-square test was applied to compare the differences of visual acuity among the three groups.
  6. **P < 0.05.
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