INTRAOPERATIVE OCT OF RABBITS’ CORNEA DURING DIFFERENT METHODS OF CORTEX REMOVAL AT PHACOEMULSIFICATION

Purpose: to study changes in the intraoperative OCT of the rabbits' cornea during experimental ultrasonic and traditional aspiration of cortex after phacoemulsification.Material and methods: experimental ultrasonic cortex aspiration with using intraoperative OCT on the right eyes of 15 rabbitswas performed (main group). Traditional irrigation-aspiration of cortex on the left eyes was performed (control group). Before the stage of cortex removal, all stages of phacoemulsification were performed in a conventional method with identical settings in both eyes of rabbits. During the stage of irrigation-aspiration of cortex the sealing of paracentesis, the gaping of the outer and inner edges of the paracentesis, and the presence of the Descemet's membrane detachment, signs of thermal damage to cornea using ultrasound were evaluated by intraoperative optical coherence tomography (OCT).Results and discussion: according to intraoperative OCT in both groups, paracentesis in all cases was sealed. In the corneal microarchitectonics in the area of paracentesis changes were found in both groups. The gaping of the inner edge of paracentesis before hydration was observed in 2 cases in the main group and in 4 cases in the control group. In control group, the gaping of the outer edge of paracentesis was founded in 1 case. These changes were eliminated after hydration of paracentesis. There were no signs of thermal damage to cornea caused by ultrasound.Conclusions: according to intraoperative optical coherence tomography, using of the system for ultrasonic cortex aspiration isaccompanied by a lower frequency of intraoperative corneal microarchitectonics in the area of paracentesis changes. Specific changes in the cornea structure associated with excessive exposure to ultrasound have not been registered.

system for ultrasonic aspiration, cortex, intraoperative OCT, paracentesis, phacoemulsification

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