Definition of GOUACHE. 1. : a method of painting with opaque watercolors.2. a: a picture painted by gouache b: the pigment used in gouache. ADVERTISEMENT.. : a method of painting with opaque watercolors. 2. a: a picture painted by gouache b: the pigment used in gouache.
On average, PRK costs between $1,800 and $6,500, depending on the severity of the refractive error and the degree of customization the patient requires. Doctors often price PRK surgery per eye, although most patients will need to correct both eyes.
PRK (photorefractive keratectomy). A surgeon removes microthin layers of tissue from the outermost layer of the cornea with a sterile brush and uses a laser to reshape the cornea to correct either nearsightedness, farsightedness, or astigmatism. Then a contact lens is placed over the eye as a temporary bandage.