Simultaneous lenses bring distant and near objects into focus at the same time. The center of the lens corrects distance vision; the outer part corrects near vision. disposable * Segmented lenses correct distance vision toric in the top half and near vision in the bottom half.Monovision contacts An alternative to bifocal contacts, monovision disposable lenses correct distance vision in one eye and near vision in the other. toric Modified monovision allows contacts wearers to put a bifocal lens in one eye and a single-vision lens in the other.Implants Designed for mild nearsightedness, disposable KeraVision Intacs are placed in the periphery of the cornea by an ophthalmic toric surgeon. Made of polymer, contacts a type of hard plastic, they require no maintenance and can be surgically removed. The outpatient procedure has a 97-percent success rate of 20/40 vision or better.

extended lenses in particular disposable and toric pose a much greater risk than contacts daily wear lenses. Though extended-wear lenses are extremely thin and allow some oxygen--necessary for healthy eyes--to reach disposable the cornea, toric they are worn continuously, including at night while the eyelid is closed. Bacteria can easily grow more easily under these conditions. Twenty-one contacts in 1,000 extended disposable lens wearers toric develop infections as opposed to contacts 4 in 1,000 daily soft lens wearers. To reduce this risk, eye care disposable professionals now recommend toric removing extended lenses contacts at night. In addition, newer versions of extended lenses being developed disposable may offer increased oxygen exchange and pose less risk. Disposable lenses may also help to prevent infection, since the wearer toric is guaranteed a clean pair of lenses every contacts few weeks or every day.