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.
First movement: sonata form. The first movement of sonata form has three main sections: exposition, development and recapitulation. Most of the musical ideas come from two main themes known as the first and second subject. In the exposition the material is 'exposed' - presented for the first time.