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Person—visual acuity (left eye), code NN

Identifying and definitional attributes

Metadata item type:Help on this termData Element
Short name:Help on this termVisual acuity (left eye)
METeOR identifier:Help on this term269963
Registration status:Help on this termHealth, Standard 01/03/2005
Definition:Help on this termA person's left eye visual acuity, as represented by a code.
Data Element Concept:Person—visual acuity

Value domain attributes

Representational attributes

Representation class:Help on this termCode
Data type:Help on this termString
Format:Help on this termNN
Maximum character length:Help on this term2
Permissible values:Help on this term
ValueMeaning
016/5
026/6
036/9
046/12
056/18
066/24
076/36
086/60
09CF (count fingers)
10HM (hand movement)
11PL (perceive light)
12BL (blind)
136/7.5
Supplementary values:Help on this term
99Not stated/inadequately described

Data element attributes

Collection and usage attributes

Guide for use:Help on this term

Record actual result for both right and left eyes:

  • 1st field: Right eye
  • 2nd field: Left eye.

Test wearing distance glasses if prescribed.

Use pinhole if vision less than 6/6.

Collection methods:Help on this term

One of the most often utilised tests for visual acuity uses the Snellen chart.

  • At a distance of 6 metres all subjects should be able to read the 6/6 line with each eye using the proper refractive correction.
  • Both eyes are to be opened and then cover one eye with the ocular occluder.
  • The observer has to read out the smallest line of letters that he/she can see from the chart.
  • This is to be repeated with the other eye.

Eye examination should be performed by an ophthalmologist or a suitably trained clinician:

  • within five years of diagnosis and then every 1-2 years for patients whose diabetes onset was at age under 30 years
  • at diagnosis and then every 1-2 years for patients whose diabetes onset was at age 30 years or more.

Source and reference attributes

Origin:Help on this termNational Diabetes Outcomes Quality Review Initiative (NDOQRIN) data dictionary
Reference documents:Help on this term

Vision Australia, No 2, 1997/8; University of Melbourne

World Health Organization

US National Library of Medicine

Diabetes Control and Complications Trial: DCCT New England Journal of Medicine, 329(14), September 30, 1993

Principles of Care and Guidelines for the Clinical Management of Diabetes Mellitus

Relational attributes

Related metadata references:Help on this term

See also Person—visual acuity (right eye), code NN Health, Standard 01/03/2005

Supersedes Visual acuity, version 1, DE, NHDD, NHIMG, Superseded 01/03/2005.pdf (19.3 KB)

Implementation in Data Set Specifications:Help on this term
All attributes +

Diabetes (clinical) DSS Health, Superseded 21/09/2005

DSS specific attributes +

Diabetes (clinical) NBPDS Health, Standard 21/09/2005

DSS specific attributes +

Diabetes (clinical) NBPDS Health, Candidate 15/05/2017

DSS specific attributes +
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