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- Landolt_C abstract "A Landolt C, also known as a Japanese Vision Test, Landolt ring or Landolt broken ring, is an optotype, i.e. a standardized symbol used for testing vision. It was developed by the Swiss-born ophthalmologist Edmund Landolt.The Landolt C consists of a ring that has a gap, thus looking similar to the letter C. The gap can be at various positions (usually left, right, bottom, top and the 45° positions in between) and the task of the tested person is to decide on which side the gap is. The size of the C and its gap are reduced until the subject makes a specified rate of errors. The minimum perceivable angle of the gap is taken as measure of the visual acuity. It is generally practised in the laboratory.The stroke width is 1/5 of the diameter, and the gap width is the same. This is identical to the letter C from a Snellen chart. The Landolt C is the standard optotype for acuity measurement in most European countries. It was standardized, together with measurement procedures, by the German DIN, as DIN 58220 (now EN ISO 8596).Although accepted as a 'gold standard' this optotype has its own inherent problems, possibly due to higher brain function where the gap will appear closed near the limit of resolution, especially when the gap is at the 6 o'clock position. This is not due to the structure of the cornea or lens, nor is it due to astigmatic errors.".
- Landolt_C thumbnail Landolt_C.svg?width=300.
- Landolt_C wikiPageID "2607078".
- Landolt_C wikiPageLength "2551".
- Landolt_C wikiPageOutDegree "12".
- Landolt_C wikiPageRevisionID "697238874".
- Landolt_C wikiPageWikiLink Category:Ophthalmology.
- Landolt_C wikiPageWikiLink Category:Optotypes.
- Landolt_C wikiPageWikiLink Deutsches_Institut_für_Normung.
- Landolt_C wikiPageWikiLink E_chart.
- Landolt_C wikiPageWikiLink Edmund_Landolt.
- Landolt_C wikiPageWikiLink Eye_chart.
- Landolt_C wikiPageWikiLink Golovin–Sivtsev_table.
- Landolt_C wikiPageWikiLink Ophthalmology.
- Landolt_C wikiPageWikiLink Snellen_chart.
- Landolt_C wikiPageWikiLink Visual_acuity.
- Landolt_C wikiPageWikiLink File:Golovin-Sivtsev_Table.svg.
- Landolt_C wikiPageWikiLink File:Landolt_C.svg.
- Landolt_C wikiPageWikiLinkText "Landolt C".
- Landolt_C wikiPageWikiLinkText "Landolt broken rings".
- Landolt_C wikiPageWikiLinkText "Landolt ring".
- Landolt_C wikiPageWikiLinkText "Landolt rings".
- Landolt_C wikiPageWikiLinkText "Landolt's broken ring chart".
- Landolt_C wikiPageWikiLinkText "acuity chart".
- Landolt_C wikiPageWikiLinkText "international definition".
- Landolt_C wikiPageUsesTemplate Template:Reflist.
- Landolt_C subject Category:Ophthalmology.
- Landolt_C subject Category:Optotypes.
- Landolt_C hypernym Optotype.
- Landolt_C type Specialty.
- Landolt_C comment "A Landolt C, also known as a Japanese Vision Test, Landolt ring or Landolt broken ring, is an optotype, i.e. a standardized symbol used for testing vision. It was developed by the Swiss-born ophthalmologist Edmund Landolt.The Landolt C consists of a ring that has a gap, thus looking similar to the letter C. The gap can be at various positions (usually left, right, bottom, top and the 45° positions in between) and the task of the tested person is to decide on which side the gap is.".
- Landolt_C label "Landolt C".
- Landolt_C sameAs Q1425525.
- Landolt_C sameAs حلقة_لاندولت.
- Landolt_C sameAs Test_de_Landolt.
- Landolt_C sameAs Landoltring.
- Landolt_C sameAs Test_de_Landolt.
- Landolt_C sameAs Landolt_C.
- Landolt_C sameAs m.07rbcg.
- Landolt_C sameAs Landoltov_kolobar.
- Landolt_C sameAs Q1425525.
- Landolt_C wasDerivedFrom Landolt_C?oldid=697238874.
- Landolt_C depiction Landolt_C.svg.
- Landolt_C isPrimaryTopicOf Landolt_C.