Age-related macular degeneration (AMD or ARMD) is the most common cause of vision loss in those aged over 50. It causes a gradual loss of central (but not peripheral) vision. Central vision is needed for detailed work and for things like reading and driving. The disease does not lead to complete blindness.
Definition of Dissonance Dissonance is the use of impolite, harsh-sounding, and unusual words in poetry. In other words, it is a deliberate use of inharmonious words, phrases, or syllables intended to create harsh sounding effects.
n. pl. aÂ·toÂ·nalÂ·iÂ·ties Music. 1. The absence of a tonal center and of harmonies derived from a diatonic scale corresponding to such a center; lack of tonality. 2. A style of composition that lacks such a tonal center and its derived harmonies.