On this page: LASEK vs. LASIK â¢ LASEK vs. PRK â¢ What to expect during and after LASEK surgery â¢ Risks and complications. LASEK eye surgery is a variation of PRK to correct myopia (nearsightedness), hyperopia (farsightedness) and astigmatism. LASEK combines certain methods from both LASIK and PRK. LASIK remains the most popular laser eye surgery, but for people who are not suitable LASIK candidates, PRK or LASEK may be better options and produce comparable outcomes to LASIK.
Sound is actually produced by the pressure changes created when small jets of air pass through moving vocal cords. This is why it can be helpful to think of breath control as the steam engine that makes the machinery of singing function.) A vocal fold. The picture above is a microscopic illustration of the vocal cords.
Voice Disorders. A voice disorder is when the voice has a problem with pitch, volume, tone, and other qualities. These problems occur when the vocal cords don't vibrate normally. Your voice is the sound that air makes when it is forced out of your lungs and passes over your vocal cords.n order to make normal speech, your vocal cords need to touch together smoothly inside your larynx. Anything that interferes with vocal cord movement or contact can cause a voice disorder. Many voice disorders can be cured with treatment when diagnosed early.