Age-Related Macular Degeneration. Age-related macular degeneration (AMD) is gradual damage to the cells of the macula. This condition is most common in people over 60 years old. It causes blurry vision, especially in the center of the field of view. According to the Foundation Fighting Blindness, AMD is the leading cause of blindness among people over age 55 in the United States.
Dental Compomer Restoratives. Compomers are dental restorative materials containing glass ionomer cement. Some features of compomers include fluoride release, radiopaque, quick cure time and good handling characteristics i.e. no slumping, easy to shape/polish, no sticking. Compomers can be light-cure or self-cure.
For other uses, see Comparator (disambiguation). In electronics, a comparator is a device that compares two voltages or currents and outputs a digital signal indicating which is larger. It has two analog input terminals V + {\displaystyle V_{+}\,} and V â {\displaystyle V_{-}\,} and one binary digital output V o {\displaystyle V_{o}\,} .