Prior to prescribing contact lenses, Dr. Lieberman determines what level of vision correction you require. Refractive error (commonly known as nearsightedness, farsightedness, or astigmatism depending on the error) is evaluated by measuring how the eyes focus when a series of different lenses are placed in front of them. An optometrist may use either a phoropter or an automated instrument to take these measurements. To schedule an appointment for a vision evaluation with our Minerva optometrist, call (330) 868-5506 today. For our Canton location, call (330) 455-1011.