SPECTACLE LENSES
Single Vision: Single vision lenses have the same optical focal point or correction over the entire area of the lens. They are used primarily to correct distance vision or near vision.
Bifocal Lenses: The upper part of the lens is generally used for distance vision, while the lower part is used for near vision. Usually, a segment line separates the two. They typically are needed for patients about 40 years old and older.
Trifocal Lenses: Trifocals are similar to bifocals, except that the distance and near focal areas are separated by a third middle area used for intermediate vision, such as computer or sheet music applications. This lens type has two segment lines, dividing the three different vision correcting segments.
Progressive Lenses: These lenses provide a smooth transition from distance vision to near vision, eliminating segment lines and allowing the viewing of all intermediate distances, somewhat like a zoom lens in a camera.
Lebanon Eyecare Associates
2627 W. Cumberland St.
Lebanon, PA 17042
(717) 272-3068
