Snellen defined standard vision as the ability to recognise a letter (âoptotypeâ) when it forms an angle of 5 arcminutes, which is âline nineâ of the letters (âoptotypesâ) on the chart at 6 metres. Hermann, Dutch ophthalmologist, 1834-1908.
In the context of the theory of Marxist revolutionary struggle, vanguardism is a strategy whereby the most class-conscious and politically advanced sections of the proletariat or working class, described as the revolutionary vanguard, form organizations in order to draw larger sections of the working class towards revolutionary politics and serve as manifestations of proletarian political power against its class enemies.
gradualism. n. 1. the policy of seeking to change something or achieve a goal gradually rather than quickly or violently, esp in politics.2. (Geological Science) the theory that explains major changes in rock strata, fossils, etc in terms of gradual evolutionary processes rather than sudden violent catastrophes.radualism. n. 1. the policy of seeking to change something or achieve a goal gradually rather than quickly or violently, esp in politics.