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.
Sonata: Used to describe several types of pieces in the baroque era, the term sonata most commonly designated a work in several movements for one or more instruments (most frequently violins) and bassocontinuo; a sonata for two violins or other treble instruments plus bass was usually called a trio sonata.