Version 2.80

Status Information

Status
DEPRECATED
Reason
Duplicate
Map-To Long Common Name Mapping Guidance
28631-0 Visual acuity study

Part Descriptions

LP73686-5   Visual acuity
When discussing visual acuity, such as 20/40, the numerator is the testing distance. In the US, 20 is measured in feet. In the metric system, the testing distance is measured in meters. Normal visual acuity is commonly referred to as 20/20 vision and the metric equivalent is 6/6 vision.

The denominator is also a distance - the distance at which the size of the tested letter would subtend an arc of 5 minutes; what changes is the size of the letters and the distance at which the letters subtend that 5 minutes of angle. A letter of the size on the 20/40 line of an eye chart would be able to be seen by a patient with normal (20/20) vision at a testing distance of 40 feet, but for a patient with reduced vision (e.g. 20/40) the letter would need to be moved closer (to 20 feet) in order to be seen. When reading an eyechart in an ophthalmology exam room, mirrors are used to simulate a 20 foot testing distance (as the room is typically much shorter than 20 feet in length).

Visual acuity is expressed as 20/20, 20/40 up to about 20/800. Vision worse than that is often expressed qualitatively as:
CF- Count Fingers
HM- Hand Motion
LP- Light Perception
NLP- No Light Perception Source: Regenstrief Help

LP73686-5   Visual acuity
Uncorrected visual acuity is a measurement of clearness of vision while the patient is not using refractive correction. Best corrected visual acuity is acuity measurement using corrective lenses, if usually worn. Visual acuity measured using a Snellen Eye Chart is reported with a numerator of the standard testing distance of 20 and a denominator indicating the distance at which strokes of the smallest letter size viewable subtend at 1 minute of arc. (e.g., 20/10: with a standard testing distance of 20 feet, the strokes of the smallest letter size viewable would subtend 1 minute of arc at 10 feet, or as more commonly explained, what the patient can see at 20 feet, the average population can see at 10 feet). If unable to read letters on a testing chart, visual acuity is described as ranging from ability to count fingers, recognize hand motion, perceive bright light, or unable to perceive light. Source: Regenstrief LOINC

Fully-Specified Name

Component
Visual acuity
Property
Find
Time
Pt
System
^Patient
Scale
Nar
Method

Additional Names

Long Common Name
Deprecated Visual acuity Narrative
Short Name
Deprecated Visual acuity

Basic Attributes

Class
DOC.MISC
Type
Clinical
First Released
Version 2.40
Last Updated
Version 2.73 (MIN)
Order vs. Observation
Both

Language Variants Get Info

Tag Language Translation
el-GR Greek (Greece) Οπτική οξύτητα:Εύρεση:Pt:^Ασθενής:Nar:
Synonyms: Εύρεση Οπτική οξύτητα
es-MX Spanish (Mexico) Agudeza visual:Tipo:Punto temporal:^ Paciente:Narrativo:
it-IT Italian (Italy) Acuità visiva:Osservazione:Pt:^Paziente:Nar:
Synonyms: Documentazione miscellanea Miscellanea Osservazione paziente Punto nel tempo (episodio)
ru-RU Russian (Russian Federation) Зрение острота:Находка:ТчкВрм:^Пациент:Опис:
Synonyms: Описательный Точка во времени;Момент
zh-CN Chinese (China) 视力:发现:时间点:^患者:叙述型:
Synonyms: 医疗服务对象;客户;病人;病患;病号;超系统 - 病人 发现是一个原子型临床观察指标，并不是作为印象的概括陈述。体格检查、病史、系统检查及其他此类观察指标的属性均为发现。它们的标尺对于编码型发现可能是名义型，而对于叙述型文本之中所报告的发现，则可能是叙述型。;发现物;所见;结果;结论 叙述;叙述性文字;报告;报告型;文字叙述;文本叙述型;文本描述;文本描述型 文档.其他;杂项类文档;其他文档 时刻;随机;随意;瞬间 杂项;杂项类;杂项试验 视觉 视觉敏锐度

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=70937-8