Blindness status code N

Identifying and definitional attributes

Metadata item type:Value Domain
METeOR identifier:270668
Registration status:Health, Standard 01/03/2005
Definition:A code set representing whether an individual has become legally blind in either one or both eyes during the previous 12 months.

Representational attributes

Representation class:Code
Data type:Number
Format:N
Maximum character length:1
Permissible values:
ValueMeaning
1Blindness - (< 6/60) occurred in either or both eyes in the last 12 months
2Blindness - (< 6/60) occurred in either or both eyes prior to the last 12 months
3Blindness - (< 6/60) occurred in one eye within 12 months and in the other eye prior to the last 12 months
4No blindness
Supplementary values:
9Not stated/inadequately described

Collection and usage attributes

Guide for use:

CODE 3     Blindness - (< 6/60) occurred in one eye within 12 months and in the other eye prior to the last 12 months

Blindness can be diagnosed in one eye within 12 months even though it has been previously diagnosed on the other eye.

Collection methods:

Ask the individual if he/she has been diagnosed as legally blind (< 6/60) in both or either eye. If so record whether it has occurred within or prior to the last 12 months.

Alternatively determine blindness from appropriate documentation obtained from an ophthalmologist or optometrist.

Relational attributes

Data elements implementing this value domain:

Person—blindness, code N Health, Standard 01/03/2005