by admin | Jan 25, 2010 | Lens Form and Theory
Industry studies have shown that approximately 70% of all spectacle wearers receive a cylinder correction for astigmatism. Further, 50% of these wearers have corrections with over 0.50 D of cylinder power. This article will show that conventional lens design does not...
by admin | Jan 25, 2010 | Lens Form and Theory
A progressive addition lens (PAL) is a type of multifocal lens that employs a surface with a continuously smooth increase in addition (Plus) power. The curvature of the surface increases from its minimum value in the distance zone to its maximum value in the near zone...
by admin | Jan 19, 2010 | Authors
Darryl Meister is the Technical Marketing Coordinator for Carl Zeiss Vision, one of the largest manufacturers of ophthalmic lenses in the world. He has been active in the optical industry since 1990 and holds both the ABO Master in Ophthalmic Optics certification and...
by admin | Jan 19, 2010 | Authors
Dr. Porter, is an Assistant Professor in the Department of Ophthalmology at Saint Louis University's Eye Institute where he also serves as director of the Low Vision Service. He also serves as an Adjunct Assistant Professor in the Department of Occupational...
by admin | Jan 19, 2010 | Authors
Dr. McDonald is currently the Director of Continuing and Distance Education at The University of North Carolina at Pembroke, a constituent member of the University of North Carolina System. He is a Licensed Optician in the State of North Carolina, and serves as a...
