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Related Experiment Video

Updated: Apr 4, 2026

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Cyclophotocoagulation and cyclocryocoagulation as primary surgical procedures for open-angle glaucoma.

Isabel Gorsler1, Hagen Thieme1, Christian Meltendorf2

  • 1Department of Ophthalmology, Otto von Guericke University, Leipziger Straße 44, 39120, Magdeburg, Germany.

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|September 5, 2015
PubMed
Summary

Cyclophotocoagulation (CPC) and cyclocryocoagulation (CCT) offer moderate intraocular pressure reduction in open-angle glaucoma. CCT showed a trend toward greater pressure decrease, with both procedures having low complication risks.

Keywords:
CyclocryotherapyCyclophotocoagulationPrimary open-angle glaucomaPrimary treatment

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Area of Science:

  • Ophthalmology
  • Glaucoma Surgery
  • Surgical Interventions

Background:

  • Open-angle glaucoma (OAG) management often requires surgical intervention to reduce intraocular pressure (IOP).
  • Cyclodestructive procedures, including cyclophotocoagulation (CPC) and cyclocryocoagulation (CCT), are utilized when other treatments fail.
  • Evaluating the comparative efficacy and safety of CPC and CCT as primary surgical options is crucial for clinical decision-making.

Purpose of the Study:

  • To compare the efficacy and complication rates of cyclophotocoagulation (CPC) versus cyclocryocoagulation (CCT) when used as primary surgical procedures for open-angle glaucoma.
  • To assess the impact of these procedures on intraocular pressure (IOP) and visual acuity.
  • To identify factors influencing the success of primary cyclodestructive surgery.

Main Methods:

  • Retrospective cohort study analyzing 184 eyes from 112 patients undergoing primary cyclodestructive surgery.
  • Procedures included cyclophotocoagulation (CPC) in 133 eyes and cyclocryocoagulation (CCT) in 51 eyes.
  • Standardized IOP measurements, best-corrected visual acuity, and antiglaucoma medication usage were recorded preoperatively and at follow-up (average 5.5 months).

Main Results:

  • Both CPC and CCT significantly reduced IOP (CPC: -1.55 mmHg; CCT: -2.33 mmHg).
  • CCT showed a trend towards greater IOP reduction, though the difference was not statistically significant (p=0.08).
  • Higher patient age and preoperative IOP were significant factors for efficacy. Serious complications, including permanent hypotension, were rare.

Conclusions:

  • Moderate IOP reduction is achievable with both primary CPC and CCT, with CCT potentially offering a greater effect.
  • Efficacy is enhanced in older patients and those with higher baseline IOP.
  • Cyclodestructive procedures as a primary treatment for OAG present a low risk of serious complications.