1 You can also take courses in math, biology, and other sciences in high school to get ahead of the game.  Another option to enrolling in a veterinary technician program is to enter a U.S. university that offers a four-year bachelor's degree in veterinary technology. There are fifteen of these programs in the country.
Help with your Glasses Prescription The Sphere The sphere (Sph) specifies the strength of lens required to correct your focus - a plus sphere to correct long-sightedness (hyperopic - difficulty focusing on close objects) and a minus to correct short sightedness (myopia - difficulty focusing on distant objects.)
Best Answer: BC written on a contact lens prescription stands for base curve. This is a measurement of the curvature of the lens.The technical definition is: the curvature of the central part of the posterior surface of a contact lens. Base curve is expressed in millimeters of radius of curvature or in diopters.Everyone has different cornea curvatures and therefore contact lenses need to come in different sizes (base curves).he technical definition is: the curvature of the central part of the posterior surface of a contact lens. Base curve is expressed in millimeters of radius of curvature or in diopters. Everyone has different cornea curvatures and therefore contact lenses need to come in different sizes (base curves).