On the Pacer one pro laser device, glasses are not used to protect vision, arguing that using a gel that absorbs energy and flashes are not as bright (however, there are flashes and there is also damage to vision). There are rules for working with all types of lasers and the mandatory use of glasses everywhere. Glasses are used for each laser depending on the wavelength range of the light and the optical density. So this is a big violation and a threat to the health of the client! The workers in the studios do not know quantum physics (reflection of rays from any surface and that the human eye is arranged like a lens and what is the danger. Unprofessionalism, in a word. I will not contact you anymore, although the girls are polite, clean and cozy, but health is most important!