The most common reason for an examination at the ophthalmologist is refractive error. However, even if you do not notice any deterioration in vision, regular examination for nearsightedness, farsightedness, or presbyopia is advisable. Often, a hidden refractive error is the cause behind unexplained headaches, neck tension, red and burning eyes, and difficulty concentrating. The advanced diagnostic capabilities of an examination at the ophthalmologist enable—far beyond a simple vision test—the detection of differentiated optical errors of the eye and form the basis for optimal provision with glasses or contact lenses. Please bring all existing glasses and visual aids to the examination.