Once your eye exam has been completed and it has been determined that you need a correction, your eyecare professional will hand you a prescription. This prescription indicates the type of visual correction you need ametropia as well as your potential presbyopia and quantifies both. This allows the eyecare professional to prescribe lenses that will correct your vision. The following is an example to help you further understand your prescription: Note: this is only an example for you to understand the elements of a prescription. Some elements like the addition or the degree of astigmatism may not be on your prescription if you don't have presbyopia or astigmatism.