Dear experts I am reposting it.. Please answer it..

2.1 Infrared ear thermometers.

2.2 Ventricular assist device.

2.3 LASIK.

2.4 Cochlear implants.

2.5 Artificial limbs.

2.6 Light-emitting diodes in medical therapies.

2.7 Invisible braces.

2.8 Scratch-resistant lenses.