Visible light is composed of electromagnetic radiation of wavelengths ranging from about 0.39 microns (violet) to 0.78 microns (deep red.) UV light has wavelengths shorter than 0.39 microns and IR light has wavelengths longer than 0.78 microns. Both UV and IR can be damaging, with the type of damage depending on wavelength. For example, light from an Nd:YAG laser at 1.06 microns is EXTREMELY hazardous to the retina, as the lens and cornea are transparent to it and will focus it - even diffusely scattered light from a sufficiently powerful Nd:YAG is hazardous. On the other hand, light from a CO2 laser at 10.6 microns is stopped by the cornea, and diffusely scattered light from one of these lasers with even moderate power has little eye hazard - but considering that CO2 lasers are used to cut metal, acrylic, etc., you better be careful to avoid direct exposure to the beam itself, depending on the actual power of the laser.
As for ultrasonics . . . I've no doubt that at sufficient power levels, they'd be bad for you. But I've no idea what those power levels are.