Development of a Fiber-Optic Optical Coherence Tomography Probe for Intraocular Use.

PURPOSE To evaluate the performance of a newly developed 23-G optical coherence tomography (OCT) probe in animal and human eyes. METHODS The probe is a side-imaging OCT device with a scanning beam set 43° to the optical axis and a working distance of 1.5 to 2.0 mm. The performance of the OCT probe was tested during vitrectomy in porcine cadaver eyes and rabbit eyes in situ. Optical coherence tomography images of a normal retina, retinal break, optic disc, pars plicata of the ciliary body, and intraoperative surgical manipulations were recorded. The probe was also tested in a pilot study of clinical cases; intraoperative real-time OCT imaging was performed in three patients, including a 56-year-old woman with an epiretinal membrane. RESULTS The OCT probe was able to delineate intraocular tissues, including the posterior retina, and even the most peripheral pars plicata in animal eyes. The OCT probe also successfully delineated intraoperative surgical maneuvers such as membrane peeling and the minute structures of the vortex veins, ora serrata, and vitreous incarceration in the scleral incision from the trocar with sufficient resolution in the patients. There were no complications resulting from its use. CONCLUSIONS The ability of this new 23-G OCT probe to obtain images of intraoperative manipulations from the most peripheral tissues in animal and patient eyes suggests that it could enable surgeons to make better decisions during the course of intraocular surgery.

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