you’re making up words at this pointeye tech: concave lens (for myopia), convex lens (for hyperopia), laser to reshape the lens (usually for astigmatism)
ear tech: hearing aid (for outer ear), bone conductive implants (for middle ear), cochlear implant (for inner ear)
kidney tech: peritoneal dialysis (the one you do at home), hemo dialysis (the one with the machine)