{"id_concept_class": "", "creation_time": 1512660593017, "event_stamp": "2013-01-14T03:34:07", "def_id_user": "usr_4de5345b3b6a8", "def_event_stamp": "2013-01-14T03:34:07", "last_updated": 1512660593017, "def_id": "def_50f37caf81e4d", "name": "NIH Toolbox Visual Acuity Test", "alias": "", "definition_text": "This test directly measures participants\u00e2\u0080\u0099 visual acuity or distance vision. The participant is seated 12.5 feet away from a computer monitor at eye level, and letters (called \u00e2\u0080\u009coptotypes\u00e2\u0080\u009d) are displayed one at a time on the screen for the participant to identify, using both eyes at the same time, with the participant wearing his/her normal corrective lenses for distance vision (glasses or contact lenses), if worn. As the participant successfully identifies optotypes of a given size, smaller ones appear on the screen, until the computer program ascertains the smallest-size optotype the participant can successfully see. Conversely, the program displays larger optotypes if the participant cannot see the size that is first displayed, until a size that he/she can accurately see is found. For participants ages 3-7, only the letters H, O, T and V are used, and children may point to a laminated card showing the letters if they cannot verbalize or recall the letter names. For participants ages 8 and above, the entire set of optotypes is used, following a common protocol used in professional vision testing. This is the standard binocular visual acuity measure scored in LogMAR units.", "id_user": "usr_4de5345b3b6a8", "id": "trm_50f37caf81432", "type": "task", "conditions": [], "concepts": [{"id_concept_class": "", "creation_time": 1512660639908, "event_stamp": "2012-07-23T17:37:19", "def_id_user": "usr_4f177506dde77", "def_event_stamp": "2012-07-23T17:37:19", "last_updated": 1512660639908, "def_id": "def_500d8bcf5f80b", "name": "visual acuity", "alias": "", "definition_text": "a measure of the finest resolution perceivable by the eyes", "id_user": "usr_4f177506dde77", "relationship": "ASSERTS", "concept_id": "trm_500d8bcf5f29a", "contrasts": [{"id": "cnt_50f37cfea325a", "name": "minimum visible size"}]}], "indicators": [{"type": "binocular acuity", "relationship": "HASINDICATOR"}], "external_datasets": [], "implementations": [], "citation": [{"citation_pubname": "", "event_stamp": "2013-01-14T03:42:38", "citation_pmid": "", "citation_desc": "http://www.nihtoolbox.org/WhatAndWhy/Sensation/Vision/Pages/NIH-Toolbox-Visual-Acuity-Test-.aspx", "citation_type": "CTM", "citation_url": "", "citation_comment": "", "id_user": "usr_4de5345b3b6a8", "id": "cit_50f37eaea712d", "citation_source": "Manual", "citation_authors": "", "citation_pubdate": "", "relationship": "HASCITATION"}, {"event_stamp": "2013-01-14T03:36:52", "citation_pubname": "Journal of vestibular research : equilibrium & orientation (J Vestib Res)", "citation_pmid": "23000614", "citation_desc": "Dynamic visual acuity testing for screening patients with vestibular impairments.", "citation_type": "CT2", "citation_url": "http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=23000614&retmode=ref&cmd=prlinks", "citation_comment": "", "id_user": "usr_4de5345b3b6a8", "id": "cit_50f37d540e01e", "citation_source": "PubMed API", "citation_authors": "Peters BT, Mulavara AP, Cohen HS, Sangi-Haghpeykar H, Bloomberg JJ", "citation_pubdate": "2012 Jan 1", "relationship": "HASCITATION"}], "contrasts": [{"creation_time": 1512660666772, "event_stamp": "2013-01-14T03:35:26", "last_updated": 1512660666772, "name": "minimum visible size", "id_user": "usr_4de5345b3b6a8", "id": "cnt_50f37cfea325a", "conditions": []}], "batteries": [{"creation_time": 1512660839340, "event_stamp": "2013-01-14T22:17:44", "website": "None", "last_updated": 1512660839340, "collection_alias": "None", "name": "NIH Toolbox Sensation and Pain Battery", "collection_date_introduced": "None", "collection_publisher": "None", "id_user": "usr_49a467bf4e0db", "collection_description": "This battery, recommended for ages 7+, consists of tests to assess various aspects of sensory function across multiple modalities.", "id": "tco_50f48408441d0", "flag_for_curator": 1, "relationship": "INBATTERY"}], "disorders": []}