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.
The frequency of beats giving maximum dissonance rises as we rise higher in the musical scale, and falls as we descend. This beat theory of dissonance was first put forward by Joseph Sauveur (1653-1716) in 1700.If the pitch is raised still further the dissonance lessens, and when there are about 130 beats per second the interval is consonant.If all tones were pure, dissonance at this part of the scale would not occur if the interval were more than a third.ut his plays-with the exception of The Witch of Edmonton, in which he doubtless had a prominent share-too often disturb the mind like a bad drel n which ends as an unsolved dissonance; and this defect is a sup.