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.
Photo Therapeutic Keratectomy-PTK Laser eye surgery. PTK is a surgical procedure which is mainly used to treat scars on the cornea and any other type of corneal surface disease.These include corneal dystrophy and epithelial erosion syndrome.he aim of this procedure is to treat surface level corneal disease and NOT to remove the need to wear glasses or contact lenses. However, this treatment can be combined with PRK which means that it has both a medical and cosmetic application.