Medical Technology

LASIK reshapes corneal tissue with a laser to change how light focuses. Learn what the procedure changes and why results and risks vary.

CPAP supplies mild continuous air pressure through a mask to support an open airway during sleep. See how it differs from a ventilator.

A home pregnancy test looks for the hormone hCG in urine. Learn why timing, instructions and a control line matter when reading the result.

DNA sequencing determines the order of A, C, G and T. See why fragments, repeated reads and data analysis are needed to reconstruct a sequence.

PCR repeatedly copies a chosen stretch of DNA using primers and temperature cycles. Learn the three core steps and what a positive result does not prove.

A hearing aid uses a microphone, processor and speaker to make selected sounds more audible. It differs from a cochlear implant and has real limits.

An EEG records voltage patterns from electrodes on the scalp. Learn what those waves reveal, and why an EEG cannot read individual thoughts.

Spirometry measures how much air you can blow out and how quickly. See what happens during the test and why effort and repeated blows matter.

Digital mammography uses low-dose X-rays and an electronic detector. Learn why compression matters, how images are read, and why follow-up can be needed.

DXA uses two X-ray energies to measure bone mineral density at the hip or spine. Here is what the result means and why it cannot predict a fracture by itself.