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.
1. the act or process of growing, progressing, or developing. 2. the product or result of developing. 3. a fact, event, or happening, esp one that changes a situation. 4. (Human Geography) an area or tract of land that has been developed. 5. (Classical Music) Also called: development section the section of a movement, usually in sonata form, in which the basic musical themes are developed.