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.
In a narrower sense, musical form is the plan of composition, or structure, of a musical work. Although the form of each composition is, to some degree, unique, there are historically determined norms of musical form, including the period, simple and compound binary form, ternary form, rondo form, and sonata form.