Painless and progressive, cataracts slowly cloud the lens. The first symptom of cataracts is often decreased night vision. The light distortion caused by cataracts also frequently produces halos around lights -- again, mostly at night. Blurry vision is also common.
sonata form. n. Music. A form of a movement consisting of three sections, the exposition, development, and recapitulation, often followed by a coda.
Origins and History. The origins of sonata-allegro form grew from older Baroque forms of the 17th century and early 18th century. The shift in styles at the century's turn had a large part in the culmination of the sonata-allegro form as well. In the Baroque period of the 17th century, a musical movement or song focused on a single emotional idea. Each movement was a mediation on one feeling.