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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Adult and child observers perceived a right heterotropia as more disturbing than a left heterotropia, and child observers perceived an esotropia as "worse" than an exotropia. Successful surgical correction of strabismus, for adult as well as children, has been shown to have a significantly positive effect on psychological well-being.
Base of these system of measuring length was the human body. වියත ( Viyatha = Span ) Length of a spread hand. රියන ( Riyana = Cubit ) Length from the elbow to middle finger. බඹ (Bamba = Fathom ) Length of two hands spread. King Nisshankamalla have established milestones called "Gaavutha Kanu" from a Gavu to another.
According to the 2012 census the population of Sri Lanka was 20,359,439, giving a population density of 325/km2. [7] The population had grown by 5,512,689 (37.1%) since the 1981 census (the last full census), equivalent to an annual growth rate of 1.1%.
Adam's Peak is a 2,243 m (7,359 ft) tall conical sacred mountain located in central Sri Lanka. [1] [2] It is well known for the Sri Pada ( Śrī Pāda ; Sinhala: ශ්රී පාද, 'sacred footprint'), a 1.8 m (5 ft 11 in) rock formation near the summit whose name is also used for the mountain itself. In Buddhist tradition the print is ...
Geography of Sri Lanka. / 7°N 81°E / 7; 81. Sri Lanka, formerly called Ceylon, is an island nation in the Indian Ocean, southeast of the Indian subcontinent, in a strategic location near major sea lanes. [1] The nation has a total area of 65,610 square kilometres (25,330 sq mi), with 64,630 square kilometres (24,950 sq mi) of land and ...
Divisional secretariats are the third-level administrative divisions of the country and there are currently [as of?] 331 divisional secretariats in Sri Lanka. [1] They were formerly known as D.R.O. divisions, after the divisional revenue officer. Later the D.R.O.s became assistant government agents and the givisions were known as A.G.A. divisions.
Sri Lanka is officially a Buddhist country, while Sri Lankans practice a variety of religions. As of the 2012 census, 70.2% of Sri Lankans were Buddhists, 12.6% were Hindus, 9.7% were Muslims (mainly Sunni ), 7.4% were Christians (mostly Catholics ). [2] [3] Buddhism is declared as the State religion of Sri Lanka and has been given special ...
In 2015, following the parliamentary election, the two major parties of Sri Lanka (the United National Party and Sri Lanka Freedom Party) signed a memorandum of understanding to form a national unity government, in an attempt to address and rectify major unresolved issues following the end of the country's 26-year long ethnic conflict.
Sri Lanka, geologically speaking is an extremely old country. Ninety percent of the rocks of the island are of Precambrian age, 560 million to 2,400 million years ago. The gems form in sedimentary residual gem deposits, eluvial deposits, metamorphic deposits, skarn and calcium-rich rocks. Nearly all the gem formations in Sri Lanka are located ...