Table 4 Frequency of postsurgical complications after trabeculectomy (TE) and PRESERFLO (PF) during 24 months of postoperative follow-up

Early (< 3 months after surgery)

 Hyphema

12

11

0.82

 Shallow anterior chamber

10

7

1.00

 Choroidal effusion

16

17

0.44

 Suprachoroidal haemorrhage

0

0

1.00

 Aqueous misdirection syndrome

2

0

0.50

 Corneal dellen

0

0

1.00

 Corneal erosion

12

7

0.63

Late (> 3 months after surgery)

 Encapsulated bleb

10

12

0.36

 Hypotonia maculopathy

3

1

0.63

 Macular oedema

2

1

1.00

 Endophthalmitis

0

0

1.00

 Tube retraction

0

0

1.00