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Eye chart
A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who
Snellen_chart
Surname list
Snellen is a Dutch surname. Snel means "quick" in Dutch and the original bearer of the name may have been a lively person. However, the origin of the
Snellen
Dutch ophthalmologist (1834–1908)
Herman Snellen (Dutch pronunciation: [ˈɦɛrmɑn ˈsnɛlə(n)], February 19, 1834 – January 18, 1908) was a Dutch ophthalmologist who in 1862 introduced the
Herman_Snellen
Chart used to measure vision
can be reliably identified is considered the person's visual acuity. The Snellen chart is the most widely used. Alternative types of eye charts include
Eye_chart
Eye chart
enable a more accurate estimate of acuity than do other charts (e.g., the Snellen chart). For this reason, the LogMAR chart is recommended, particularly
LogMAR_chart
Clarity of near objects or letters
refers clarity of distance vision, and is measured using eye charts like Snellen chart, LogMAR chart etc. Near vision is usually measured and recorded using
Near_visual_acuity
Dutch entomologist (1816–1880)
Samuel Constant Snellen van Vollenhoven (18 October 1816, Rotterdam – 22 March 1880) was a Dutch entomologist. He is not to be confused with Pieter Cornelius
Samuel Constant Snellen van Vollenhoven
Samuel_Constant_Snellen_van_Vollenhoven
Dutch entomologist (1832–1911)
Pieter Cornelius Tobias Snellen (30 August 1832 – 29 March 1911) was a Dutch entomologist. Pieter Snellen was a merchant in Rotterdam. He is not to be
Pieter Cornelius Tobias Snellen
Pieter_Cornelius_Tobias_Snellen
Set of optotypes used to test visual acuity
acuity generally used in Snellen charts, logMAR charts and ETDRS charts. These letters, unlike the ones used in older Snellen charts, are designed to give
Sloan_letters
Clarity of vision
what was defined by Herman Snellen as the ability to recognize an optotype when it subtended 5 minutes of arc, that is Snellen's chart 6/6-metre, 20/20 feet
Visual_acuity
Medical procedure for the eye
logMAR or 20/400 Snellen): 63% for OOKP and 49% for OKP 10-year functional survival (visual acuity better than 1.30 logMAR or 20/400 Snellen): 38% for OOKP
Osteo-odonto-keratoprosthesis
Species of moth
crocochalca is a species of moth in the family Crambidae. It was described by Snellen in 1880. It is found in the Democratic Republic of Congo. "global Pyraloidea
Ulopeza_crocochalca
decreasing by 0.1 log unit steps, from 1.3 logMAR (Snellen equivalent 20/400 at 40 cm) to −0.5 logMAR (Snellen equivalent 20/6). Charts are available in many
MNREAD_acuity_chart
Genus of moths
a genus of moths of the family Crambidae. Lepidoplaga flavicinctalis (Snellen, 1890) "GlobIZ search". Global Information System on Pyraloidea. Retrieved
Lepidoplaga
Species of moth
Pyrausta polygamalis is a moth in the family Crambidae. It was described by Snellen in 1875. It is found in Colombia and Ecuador. "GlobIZ search". Global Information
Pyrausta_polygamalis
Genus of moths
Orybina is a genus of moths of the family Pyralidae. It was described by Snellen in 1895. Orybina flaviplaga Walker, 1863 Orybina plangonalis (Walker, 1859)
Orybina
Species of moth
Microthyris microthyralis is a moth in the family Crambidae. It was described by Snellen in 1899. It is found in Peru and Brazil. "GlobIZ search". Global Information
Microthyris_microthyralis
Species of moth
Saptha pronubana is a moth in the family Choreutidae. It was described by Snellen in 1877. It is found on Java and Sulawesi. choreutidae.lifedesks.org Natural
Saptha_pronubana
Species of moth
Tyspanodes flavolimbalis is a moth in the family Crambidae. It was described by Snellen in 1895. It is found in Indonesia (Sumatra, Java). "global Pyraloidea database"
Tyspanodes_flavolimbalis
Species of moth
in the family Crambidae found in Indonesia (Java). It was described by Snellen in 1899. "global Pyraloidea database". Globiz.pyraloidea.org. Retrieved
Sufetula_sythoffi
Species of insect
tenuipalpella is a moth in the family Lecithoceridae. It was described by Snellen in 1903. It is found on Java. The wingspan is 11–14 mm. The forewings are
Homaloxestis_tenuipalpella
Species of moth
Bocchoris graphitalis is a moth in the family Crambidae. It was described by Snellen in 1875. It is found in Colombia. "GlobIZ search". Global Information System
Bocchoris_graphitalis
Species of moth
Cnaphalocrocis subvenilialis is a moth in the family Crambidae. It was described by Snellen in 1895. It is found on Java. "GlobIZ search". Global Information System
Cnaphalocrocis_subvenilialis
J. Schmidt Platz Zeilvliegtuig – Platz, Reinhold – Netherlands Snellen V-20 – Snellen, Roeland J. – NV Vliegtuigbouw Deventer Hoekstra T-20 - J.K. Hoekstra
List_of_Dutch_gliders
Series of tests assessing vision and pertaining to the eyes
20 feet.This is often measured with a Snellen chart or LogMAR chart. Visual acuity is usually measured with a Snellen or LogMAR chart with a lit background
Eye_examination
Species of insect
Stictane fractilinea is a moth in the family Erebidae. It was described by Snellen in 1880. It is found on Sumatra and possibly in India (Sikkim), Sri Lanka
Stictane_fractilinea
Genus of moths
It contains only one species, Promacrochilo ambiguellus, described by Snellen in 1890, which is found in China (Hainan), India, Nepal, Myanmar, Thailand
Promacrochilo
Genus of beetles
found in Eastern Malesia and Australia. Species: Aporhina alboguttata (Snellen van Vollenhoven, 1866) Aporhina aruensis (Heller, 1896) Aporhina aspericollis
Aporhina
Austrian ophthalmologist
Küchler (1811-1873). In 1862 Dutch ophthalmologist Hermann Snellen introduced the popular "Snellen chart" for testing visual acuity. Beiträge zur Pathologie
Eduard_Jäger_von_Jaxtthal
Species of moth
Glyphodes jaculalis is a moth in the family Crambidae. It was described by Snellen in 1894. It is found on Java. "GlobIZ search". Global Information System
Glyphodes_jaculalis
Species of insect
costipunctalis is a moth in the family Crambidae. It was described by Snellen in 1899. It is found in Indonesia (Java). "GlobIZ search". Global Information
Steniodes_costipunctalis
Genus of moths
Chalciope bisinuata Snellen, 1880 Chalciope delta (Boisduval, 1833) (= Chalciope crestonion (Snellen, 1902)) Chalciope emathion Snellen, 1902 Chalciope erecta
Chalciope_(moth)
Species of moth
Eoophyla latifascialis is a moth in the family Crambidae. It was described by Snellen in 1876. It is found on Sulawesi. "GlobIZ search". Global Information System
Eoophyla_latifascialis
Species of butterfly
in Sulawesi. It was first described in 1891 by Pieter Cornelius Tobias Snellen. Upperside, syntype male, from southern Sulawesi Theclinae Vane-Wright
Sinthusa_verriculata
Species of moth
Crocidophora amoenalis is a moth in the family Crambidae. It was described by Snellen in 1890. It is found in India (Sikkim). "GlobIZ search". Global Information
Crocidophora_amoenalis
Species of moth
family Erebidae. It was described by Snellen in 1879. It is found on Sulawesi. Savela, Markku. "Spilarctia moorei (Snellen, 1879)". Lepidoptera and Some Other
Spilarctia_moorei
Species of moth
the family Depressariidae. It was described by Pieter Cornelius Tobias Snellen in 1901. It is found on Java. Odites Archived 2018-07-20 at the Wayback
Odites_albidella
Species of moth
Pyrausta albipedalis is a moth in the family Crambidae. It was described by Snellen in 1899. It is found on Java. "global Pyraloidea database". Globiz.pyraloidea
Pyrausta_albipedalis
Species of moth
Parapoynx bilinealis is a moth in the family Crambidae. It was described by Snellen in 1876. It is found in India and Japan. It has also been recorded from
Parapoynx_bilinealis
Genus of moths
(Dognin, 1908) Diaphania attigua (E. Hering, 1906) Diaphania auricollis (Snellen, 1875) Diaphania aurogrisealis (Hampson, 1912) Diaphania beckeri Clavijo
Diaphania
Species of moth
is a moth in the family Crambidae, found on Java. It was described by Snellen in 1899. "GlobIZ search". Global Information System on Pyraloidea. Retrieved
Leucinodes_unilinealis
Species of moth
Xystophora psammitella is a moth of the family Gelechiidae. It was described by Snellen in 1884. It is found in the Russian Far East, Korea, China (Shaanxi) and
Xystophora_psammitella
Genus of moths
Species: Morophaga borneensis Robinson, 1986 (Sabah) Morophaga bucephala (Snellen, 1884) (Korea) Morophaga choragella (Denis & Schiffermüller, 1775) (palearctic)
Morophaga
Genus of moths
hartoghialis (Snellen, 1872) (from Congo) Cangetta homoperalis Hampson, 1899 Cangetta micralis (Hampson, 1907) Cangetta murinalis Snellen, 1901 Cangetta
Cangetta
Species of moth
Bocchoris trimaculalis is a moth in the family Crambidae. It was described by Snellen in 1880. It is found on India, Burma, and Sulawesi. "GlobIZ search". Global
Bocchoris_trimaculalis
Species of moth
Pyrausta nugalis is a moth in the family Crambidae. It was described by Snellen in 1899. It is found on Java and in India (Assam). "global Pyraloidea database"
Pyrausta_nugalis
Genus of moths
azialis Druce, 1896 Parapoynx badiusalis Walker, 1859 Parapoynx bilinealis Snellen, 1876 Parapoynx bipunctalis Hampson, 1906 Parapoynx candida You & Li in
Parapoynx
Species of moth
Ceryx hageni is a moth of the subfamily Arctiinae. It was described by Snellen in 1895. It is found on Sumatra. Beccaloni, G.; Scoble, M.; Kitching, I
Ceryx_hageni
Second planet from the Sun
atmosphere". New Scientist. 248 (3306): 18. doi:10.1016/S0262-4079(20)31910-2. Snellen, I. A. G.; Guzman-Ramirez, L.; Hogerheijde, M. R.; Hygate, A. P. S.; van
Venus
Species of moth
Glyphodes proximalis is a moth in the family Crambidae. It was described by Snellen in 1899. It is found in India (the Himalayas) and in Indonesia (Java).
Glyphodes_proximalis
Blindness present at birth
Screening test: Snellen Chart
Congenital_blindness
Species of moth
Species: D. superalis Binomial name Diaphania superalis (Guenée, 1854) Synonyms Phakellura superalis Guenée, 1854 Phakellura gigantalis Snellen, 1875
Diaphania_superalis
Subfamily of moths
1956 Cryptocosma Lederer, 1863 (= Chalcoelopsis Dyar, 1914) Decticogaster Snellen, 1880 Diathraustodes Hampson, 1896 Dodanga Moore, 1886 Elophila Hübner
Acentropinae
Genus of moths
(Moore, 1882) Zurobata rorata Walker, 1865 (syn: Zurobata constellata (Snellen, 1880), Zurobata multiguttata (Moore, 1885)) Zurobata vacillans (Walker
Zurobata
Species of moth
serenalis is a subspecies of moth in the family Crambidae. It was described by Snellen in 1880. It is found on Sulawesi. "GlobIZ search". Global Information System
Glyphodes_serenalis
Species of moth
Dendrophilia albidella is a moth of the family Gelechiidae. It was described by Snellen in 1884. It is found in Russia (central and southern Siberia and Primorskii
Dendrophilia_albidella
Genus of moths
listings, may be from protonym Nothris albidella Snellen, 1884, later Empalactis albidella (Snellen, 1884).) De Prins, J. & De Prins, W. (2017). "Dactylethrella
Dactylethrella
Species of moth
flavicinctalis is a moth in the family Crambidae. It was described by Snellen in 1890. It is found in India (Sikkim) and Sri Lanka. "GlobIZ search".
Lepidoplaga_flavicinctalis
Species of beetle
vittata Snellen Van Vollenhoven, 1864 Synonyms Parastasia buruensis Ohaus, 1903 Parastasia ceramensis Nonfried, 1895 Parastasia atra Snellen Van Vollenhoven
Parastasia_vittata
Medical diagnostic method
example, near fixation stick Distance target. For example, most commonly a Snellen chart is utilised, however the LogMAR chart is preferred as it has letters
Prism_cover_test
Species of moth
Lamprosema rubricetalis is a moth in the family Crambidae. It was described by Snellen in 1880. It is found on Sulawesi. "GlobIZ search". Global Information System
Lamprosema_rubricetalis
Species of moth in genus Lecithocera
fuscedinella is a moth in the family Lecithoceridae. It was described by Snellen in 1901. It is found on Java. The wingspan is about 18 mm. The forewings
Lecithocera_fuscedinella
Butterfly genus in family Lycaenidae
Lycaenidae. Rhinelephas arrhina Toxopeus, 1928 Rhinelephas cyanicornis (Snellen, 1892) Wikispecies has information related to Rhinelephas. "Rhinelephas
Rhinelephas
Species of beetle
is a species of beetle in the family Cerambycidae. It was described by Snellen van Vollenhoven in 1871. It is known from Papua New Guinea and Indonesia
Tmesisternus_isabellae
Species of moth
Coptobasis moellingeri is a moth in the family Crambidae. It was described by Snellen in 1895. It is found on Java. "GlobIZ search". Global Information System
Coptobasis_moellingeri
Species of moth
Perimeceta incrustalis is a moth in the family Crambidae. It was described by Snellen in 1895. It is found on Java and in Australia, where it has been recorded
Perimeceta_incrustalis
Genus of moths
is a genus of moths of the family Crambidae. Chrysothyridia invertalis (Snellen, 1877) Chrysothyridia triangulifera Munroe, 1967 "GlobIZ search". Global
Chrysothyridia
Species of moth
dominia (Cramer, 1780) Synonyms Phalaena dominia Cramer, 1780 Aganais herpa Snellen, 1879 Noctua chione Fabricius, 1781 Phalaena Bombyx eugenia Cramer, 1782
Neochera_dominia
Species of moth
Syllepte abyssalis is a moth in the family Crambidae. It was described by Snellen in 1892. It is found in New Guinea, Indonesia (Java, Ambon Island) and
Syllepte_abyssalis
Species of moth
wingspan is 39–42 mm. Adults are on wing in May. Savela, Markku. "Orybina Snellen, 1895". Lepidoptera and Some Other Life Forms. Retrieved September 27,
Orybina_flaviplaga
Genus of cricket-like animals
Arachnacris tenuipes Giebel, 1861 - type species (synonym A. imperator Snellen van Vollenhoven, 1865) Giebel CGA (1861) Neue ostindische Schrecken. Zeitschrift
Arachnacris
Species of beetle
Phylloserica Species: P. unicolor Binomial name Phylloserica unicolor (Snellen Van Vollenhoven, 1877) Synonyms Pleophylla unicolor Snellen Van Vollenhoven, 1877
Phylloserica_unicolor
University of Groningen. JPL · 12938 12939 Ignassnellen 4206 P-L Ignas Snellen (b. 1970) is a Dutch astronomer, specializing in the study of exoplanets
Meanings of minor-planet names: 12001–13000
Meanings_of_minor-planet_names:_12001–13000
Species of moth
Scirpophaga monostigma Zeller, 1863 Scirpophaga butyrota Meyrick, 1889 Scirpophaga intacta P.C.T. Snellen, 1890 Topeutis rhodoproctalis Hampson, 1919
Scirpophaga_excerptalis
Species of moth
is a species of snout moth in the genus Emmalocera. It was described by Snellen in 1880, and is known from India, the Nicobar Islands, Singapore, Sumatra
Emmalocera_anerastica
Species of moth
Desmia geminalis is a moth in the family Crambidae. It was described by Snellen in 1875. It is found in Colombia. "GlobIZ search". Global Information System
Desmia_geminalis
Species of moth
Calamotropha latellus is a moth in the family Crambidae. It was described by Snellen in 1890. It is found in India (Darjeeling). "GlobIZ search". Global Information
Calamotropha_latellus
Species of moth
Syllepte favillacealis is a moth in the family Crambidae. It was described by Snellen in 1899. It is found in Indonesia (Java). "global Pyraloidea database"
Syllepte_favillacealis
Species of moth
ictericalis is a moth in the family Crambidae. It was first described by Snellen in 1895. It is found on Java. "global Pyraloidea database". Globiz.pyraloidea
Pyrausta_ictericalis
Species of moth
Talanga advenalis is a moth of the family Crambidae. It was described by Snellen in 1895. It is found in Indonesia (Java). Wikimedia Commons has media related
Talanga_advenalis
Genus of moths
species, Berastagia dissolutella, described by Pieter Cornelius Tobias Snellen in 1880. It is found in Australia. "GlobIZ search". Global Information
Berastagia
Species of moth
Anarmodia inflexalis is a moth in the family Crambidae. It was described by Snellen in 1892. It is found in Brazil. "global Pyraloidea database". Globiz.pyraloidea
Anarmodia_inflexalis
Genus of moths
family Crambidae. Parotis amboinalis (Swinhoe, 1906) Parotis angustalis (Snellen, 1895) Parotis ankaratralis Marion, 1954 Parotis arachnealis (Walker, 1859)
Parotis
Species of moth
Diastictis incisalis is a moth in the family Crambidae. It was described by Snellen in 1880. It is found on Sulawesi. "GlobIZ search". Global Information System
Diastictis_incisalis
Genus of moths
Snellen, 1890 Hypenodes modesta Schaus, 1913 Hypenodes obliqualis Snellen, 1890 Hypenodes prionodes D. S. Fletcher, 1961 Hypenodes pudicalis Snellen,
Hypenodes
Species of moth
of the subfamily Arctiinae. It was described by Pieter Cornelius Tobias Snellen in 1880. It is found on Sumatra and Borneo and in the north-eastern Himalayas
Lyclene_pudibunda
Species of moth
Nyctemera regularis is a moth of the family Erebidae first described by Snellen in 1880. It is found on Sumatra, Java and Borneo. Nyctemera regularis regularis
Nyctemera_regularis
Genus of moths
von Paula Schrank in 1802. They have aquatic larvae. Nymphula coenosalis Snellen, 1895 Nymphula corculina Butler, 1879 Nymphula definitalis Strand, 1919
Nymphula
Genus of moths
buergersi Gaede, 1926 Scaptesyle bicolor Walker, 1864 Scaptesyle bifasciata Snellen, 1904 Scaptesyle bipartita Rothschild, 1913 Scaptesyle bizone Rothschild
Scaptesyle
Species of butterfly
Synonyms Lycaena osiris Hopffer, 1855 Lycaena anubis Snellen, 1872 Lycaena anubis var. phoa Snellen, 1872 Lycaena pyrrhops Mabille, 1877 Catochrysops cuprescens
Euchrysops_osiris
Quality of an image being out of focus
refractive errors play in limiting the quality of the patient's vision. A Snellen acuity of 6/6 or 20/20, or as decimal value 1.0, is considered to be sharp
Defocus_aberration
Genus of moths
(Hübner, 1793) Pyrausta albescens Hampson, 1913 Pyrausta albipedalis (Snellen, 1899) Pyrausta albogrisea Hampson, 1913 Pyrausta alexandra Shodotova,
Pyrausta_(moth)
Genus of moths
1953 Dichocrocis atrisectalis Hampson, 1908 Dichocrocis attemptalis (Snellen, 1890) Dichocrocis bilinealis Hampson, 1896 Dichocrocis bimaculalis Kenrick
Dichocrocis
Genus of moths
[1866]) Sacada fasciata (Butler, 1878) Sacada flexuosa Snellen, 1890 Sacada miraculosa (Snellen, 1885) Sacada pallescens Hampson, 1896 Sacada pyraliformis
Sacada_(moth)
Species of moth
Scaptesyle bifasciata is a moth in the subfamily Arctiinae. It was described by Snellen in 1904. It is found on Java. Beccaloni, G.; Scoble, M.; Kitching, I.;
Scaptesyle_bifasciata
Species of metalmark moth
Choreutis piepersiana is a moth in the family Choreutidae. It was described by Snellen in 1885. It is found on Sulawesi. Beccaloni, G.; Scoble, M.; Kitching,
Choreutis_piepersiana
Species of moth
Hypocrita euprepioides Walker, 1862 Barsine euprepioides Hypocrita inclusa Snellen, 1877 Lyclene interserta Moore, 1878 Asura euprepioides ab. samboanganus
Cyme_euprepioides
Species of moth
Ptychopseustis Species: P. argentisparsalis Binomial name Ptychopseustis argentisparsalis (Snellen, 1880) Synonyms Platytes argentisparsalis Snellen, 1880
Ptychopseustis argentisparsalis
Ptychopseustis_argentisparsalis
Butterfly genus in family Lycaenidae
butterflies in the family Lycaenidae. Subgenus Oreolyce Oreolyce quadriplaga (Snellen, 1892) – Naga hedge blue Oreolyce archena (Corbet, 1940) Oreolyce boulti
Oreolyce
Butterfly genus in family Lycaenidae
Ghissarsky, Baisuntau, Fanskie) Unknown species group: Lycaena bathinia Snellen, 1899 dubious Java Lycaena clarki Dickson, 1971 – eastern sorrel copper
Lycaena
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