Table 3

Adverse events

Abexterno TLO (n=50)Abinterno TLO (n=50)P value*
Hyphema with niveau (%)10(20)8 (16)0.80
Transient increase in IOP (%)12(24)18(36)0.28
Additional glaucoma surgeries (%)9 (18)11(22)0.80
Trabeculectomy8 (16)9 (18)1.00
Tube shunt surgery1 (2)2 (4)1.00
Vitreous haemorrhage (%)1 (2)2 (4)1.00
Descemet membrane rupture (%)3 (6)0 (0)0.24
Transient hypotony (%)1 (2)0 (0)1.00
Cystoid macular oedema (%)0 (0)1 (2)1.00
Bullous keratopathy (%)0 (0)1 (2)1.00
  • *Fisher’s exact test.

  • ab externo TLO, trabeculotomy ab externo; ab interno, trabeculotomy ab interno using a microhook; IOP, intraocular pressure.