chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. Eye charts...

an acuity chart are formally known as "optotypes". In the case of the traditional Snellen chart, the optotypes have the appearance of block letters, and...

acuity would discern the same optotype. Thus, 6/12 means that a person with 6/6 vision would discern the same optotype from 12 metres away (i.e. at twice...

as a Landolt ring, Landolt broken ring, or Japanese vision test, is an optotype: a standardized symbol used for testing vision. It was developed by the...

which uses continuous text paragraphs with logarithmic progression of optotype sizes, was a reading chart introduced in 1960s. Near acuity was recorded...

LogMAR value of the best line read − 0.02 × number of optotypes read Given that each line has 5 optotypes, the equivalent formula is: LogMAR VA = LogMAR value...

The most significant innovation was Snellen's use of what he called optotypes, specially designed characters generated on a 5x5 grid, rather than using...

against the standardized Landolt C vision test symbol. The Landolt C is an optotype that is used throughout most of the world as the standardized symbol for...

systematic data collection in physical sciences and engineering Landolt C, optotype developed by ophthalmologist Edmund Landolt Landolt & Cie, Swiss bank 15072...

1959, are a set of optotypes used to test visual acuity generally used in Snellen charts and logMAR charts. This set of optotypes consists of ten specially...

resolution of 2 arcminutes per line pair, equivalent to a 1 arcminute gap in an optotype, corresponds to 20/20 (normal vision) in humans. However, in the compound...

An E chart, also known as a tumbling E chart, is an eye chart used to measure a patient's visual acuity. This chart does not depend on a patient's easy...

The Jaeger chart is an eye chart used in testing near visual acuity. It is a card on which paragraphs of text are printed, with the text sizes increasing...

assessors ISO 8596:2009 Ophthalmic optics – Visual acuity testing – Standard optotype and its presentation ISO 8598 Optics and optical instruments – Focimeters...

ISO/TR 19498:2015 Ophthalmic optics and instruments – Correlation of optotypes ISO/IEC 19500 Information technology - Object Management Group - Common...

creation of the Sloan letters, used to test visual acuity. These ten optotypes, according to Sloan, were specifically chosen from capital letters of...

professor of ophthalmology at the university. From 1882 to 1896 he developed optotypes for the testing of vision. He also made contributions in the areas of...