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Eye Exams Near You Also, the convenient cleaning regimen of a disposable lens is only adequate for a 2 week wearing schedule. The first mimics bifocal eyeglasses closely, with a separate section for each prescription. This is called a segmented bifocal, and sometimes also referred to as an alternating or translating bifocal. Usually, the near vision prescription is in the lower part of the lens, and the normal, distance prescription is in the rest of the lens. When your prescription expires, you won’t be able to buy more lenses until your eye care practitioner gives you an updated prescription. contacts can also correct astigmatism and hyperopia too. Contact lenses are placed directly on the eye to change the refractive surface, and the National Eye Institute explains that this can help you to focus better. Contacts may also give you a wider field of vision than eyeglasses since they sit directly on the eyes. They also do not change your physical appearance and can seem more comfo