Identifying and definitional attributes
|Metadata item type:||Value Domain|
|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.|
|Maximum character length:||1|
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.
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.
|Data elements implementing this value domain:|
Person—blindness, code N Health, Standard 01/03/2005