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.
A general model of sonata form. The exposition may be thought of as consisting of only two large sections: (1) First Group and Transition -- consisting of one or more tonic-key themes and ending with a transition that leads to a cadence off the tonic.