Posters
Doppler vibrometry of the YAG-laser energy effect on the eye structures
Poster Details
First Author: J.Bantcykina RUSSIA
Co Author(s): I. Malov A. Safin V. Grishanov V. Malov E. Eroshevskaya A. Alexandrov
Abstract Details
Purpose:
Study of the YAG-laser energy effect on the inner structures of the eye by measuring the vibration of the sclera by laser doppler vibrometry.
Setting:
Russia, Samara State Medical University in conjunction with Samara University, 2020 year
Methods:
Six pig's eyes were used in the experiment. The first stage was phacoemulsification of the lens by the standard method using the phacoemulsifier "OPTIMED". Ultrasound parameters were 20 %, aspiration 30 cm3/min, vacuum 200 mm Hg. The eye was fixed on the YAG-laser (Yatagan-4). 6 laser pulses of 13.7 mJ every 10 seconds were applied to the rear lens capsule and, in control, to the posterior pole sclera. The vibration parameters of the rear pole of the sclera were recorded on a non-contact laser Portable Digital Vibrometer Polytec PDV-100 in the projection of the macular area on the sclera.
Results:
As a result of the experiment, time of the sclera vibration after YAG-laser impulse is in average 0,000675± 0,000182 sec, that is comparable with the time of vibration of the rear pole of the sclera at performance of the rear capsule dicission . The increase in the level of vibration recorded from the sclera surface is 3,0±0,5 times less when pulses are applied to the posterior capsule compared to applying pulses to the sclera.
Conclusions:
Our study shows that exposure to laser pulse on the shell of the eye can be measured with a laser vibrometer, that the results are stable, that there is a difference between the data obtained by applying pulses inside and outside the eye, which means that the internal structures of the eye partially absorb laser pulse, which may increase the risk of retinal detachment in the eyes with myopia and retinal dystrophy. The study needs to be continued.
Financial Disclosure:
None
