Sputum, or phlegm, is a mixture of saliva and mucus that youâve coughed up. Blood-tinged sputum occurs when the sputum has visible streaks of blood in it. The blood comes from somewhere inside of your body, either from along the respiratory tract or digestive system. The respiratory tract includes the: mouth. throat.
LASIK surgery is a type of refractive eye surgery. During the procedure, an eye surgeon creates a flap in the cornea, and then uses a laser to reshape the cornea and correct focusing problems in the eye.
Please Share! PRK (photorefractive keratectomy) is a type of refractive surgery to correct myopia (nearsightedness), hyperopia (farsightedness) and astigmatism. PRK was the first type of laser eye surgery for vision correction and is the predecessor to the popular LASIK procedure. Though PRK recovery takes a bit longer than recovery from LASIK eye surgery, PRK is still commonly performed and offers advantages over LASIK for some patients.