Occlusion sensing in ophthalmic laser probes

Abstract

In certain embodiments, a system for sensing occlusions in an optical system includes a first laser source configured to generate optical signals and a set of optical elements arranged to receive the optical signals from the first laser source and to direct the optical signals along a beam path. The system also includes a detector arranged to receive reflections of the optical signals travelling along at least a portion of the beam path and a control system communicably coupled to the detector. The control system is configured to detect, based on signals generated by the detector, reflection signals associated with the reflections of the optical signals, and disable a second laser source based on detection of the reflection signals.

Description

technical field

[0001] The present disclosure relates to occlusion sensing in laser probes, such as laser probes used in ophthalmic surgery (eg, multi-point ophthalmic laser probes). Background technique

[0002] Laser probes can be used in certain eye procedures such as laser photocoagulation. Laser photocoagulation treats eye conditions such as retinal detachments and tears, and proliferative retinopathy caused by conditions such as diabetes. Abnormally high blood sugar in diabetics stimulates retinal blood vessels to release growth factors, which in turn promote the undesired proliferation of blood vessels and capillaries on the surface of the retina. These growing blood vessels are very fragile and bleed easily into the vitreous. The body's response to damaged blood vessels is to produce scar tissue, which can in turn lead to retinal detachment and eventually blindness.

[0003] In laser photocoagulation, a laser probe, such as a multipoint laser probe, is used to bur...

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