G-Probe™ Device 1

G-Probe™ Device

Transscleral cyclophotocoagulation (TSCPC) using the G-Probe glaucoma device is a long-term, effective intraocular pressure (IOP) lowering procedure for many types of glaucoma patients.1-3 Patients with refractory glaucoma and those with good visual acuity can benefit from TSCPC using the G-Probe.

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G-Probe glaucoma device performs transscleral cyclophotocoagulation (TSCPC) to lower IOP through selective ablation of the ciliary processes. This simple, yet effective repeatable procedure can be performed in the office, operating room, or in conjunction with other procedures, like cataract surgery.


G-Probe treatment G-Probe placement G-Probe application


Hold the G-Probe™ parallel to the visual axis with the shorter edge of the footplate firmly between the anterior border and the middle of the limbus. Laser delivery is transscleral.


Successive applications are spaced one-half the width of the G-Probe footplate apart by aligning a side of the probe over the indented center of the adjacent application.


Administer 18-21 laser applications per treatment session over 270° (three quadrants, six or seven applications per quadrant), usually omitting the temporal quadrant.

G-Probe treatment parameters are suggested by IRIDEX and are based on recommendations by experienced clinicians. Ultimately, it is the physician’s responsibility to determine appropriate treatment parameters for each case.

Iris Color



Energy per Application

Dark Brown 1250 mW 4000 ms 5.00 joules
All other 1500 mW 3500 ms 5.25 joules

This array of treatment parameters has been called the “slow coagulation” technique and has proven effective for most eyes.


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