Members of the board of directors of Altria Group as/of February 2013 were: 1  Elizabeth E. Bailey (1989â ), professor emerita, the Wharton School, University of Pennsylvania. 2  Gerald L. Baliles (2008â ), director, Miller Center of Public Affairs at University of Virginia; former Virginia governor.
An extra-oral digital panoramic dental x-ray imaging system is disclosed for multi-layer panoramic and transverse X-ray imaging. The system includes an X-ray source and a digital imaging device capable of âreal timeâ frame mode output.
The major components of the phoropter are the battery of spherical and cylindrical lenses, auxiliary devices such as Maddox rods, filtered lenses, prisms, and the JCC (Jackson Cross-Cylinder) used for astigmatism measurement. The prismatic lenses are used to analyze binocular vision and treat orthoptic problems.