Subject 18:Progressive Addition Lenses.

• Identification of Progressive Addition Lenses

• Regions of a Progressive Addition Lens• Markings in a Progressive Addition Lens• Center of a Progressive Lens• Determining the parameters of a

progressive lens

Identifying Progressive Addition Lenses

• IDENTIFICATION THROUGH OBSERVATION

• MICROETCHINGS OR MARKS SENSITIVE TO ULRTRAVIOLET LIGHT

The regions of a progressive addition lens.

Marks on a progressive lens

REFERENCE CIRCLES

ADDITION

Center of a progressive lens

LENSMETER

PUPIL

Determining the parameters of a progressive lens

• Locate the marks using illumination over a dark background and a marker,

• Place the lens on a template provided by the manufacturer and transcribe the other markings,

• Place the lens in a lens-meter and determine its powers.

Bibliography

 1.- Tecnología óptica. Lentes oftálmicas, diseño y adaptación.Joan Salvadó, Marta Fransoy y otros.Edicions UPC 1997 colección POLITEXT

 2.- El vidrio y la óptica ocular.

Editor. Corning France 1988. 3.- Lents oftàlmiques pràctiques.

Marta Lupon, Marisa Vera, Joan A. Martinez, Jesús Caum

Bibliography

 4.- Manual de prácticas de óptica oftálmica.Eloy A. Villegas, Antonio Benito.Editor. Universidad de Murcia 1999.

 5.- Clinical Optics

Troy E. Fannin, Theodore Grosvennor.Editor. Butterworth-Henemann 1996 2ª edición.