However, the long-term efficacy of IOP control in deep sclerectomy is poor, unlike in trabeculectomy, in which case a number of adjunctive techniques are being used to increase the efficacy like intraoperative use of antimetabolites, Ologen like intrascleral implants  as well as performing laser goniopuncture
early when the IOP rises above the target value.
Therefore, a range of methods to prevent the collapse has been proposed, including a collagen implant , a slit incision of Schlemm's canal , or goniopuncture .
Schnyder et al., "Nd:YAG goniopuncture after deep sclerectomy with collagen implant," Ophthalmic Surgery and Lasers, vol.
was performed in both groups when filtration through TDM was suspected to be insufficient accompanied by elevated IOP.
YAG laser goniopuncture
was performed after 2 to 12 months in 26 eyes (12.1%), which were included in the analysis.
Q-switched laser iridectomy and Q-switched laser goniopuncture
. Adv Ophthalmol.
"Non-penetrating glaucoma surgery has fewer complications than a traditional trabeculectomy (first done in 1968) and allows us the option to perform YAG-laser goniopuncture
at a later stage thus transforming non-penetrating surgery into a penetrating one," Dr Kazakova explains.
Also, any further intervention needed was recorded such as yttrium aluminum garnet (YAG) laser goniopuncture
, needling, or ab interno revision plus subconjunctival 5-fluouracil injection.
In three patients in the postoperative period (1 month after surgery) we noticed a slight elevation in IOP (above 25 mmHg); therefore goniopuncture
In the canaloplasty group, only two eyes required further intervention (anterior chamber reformation and goniopuncture
), while in the trabeculectomy group, a total of 112 procedures were necessary to control IOP (5FU injection, 5-FU needling, bevacizumab injection, laser suture lysis, anterior chamber reformation, bleb revision, cataract surgery, and conjunctival closure).