Visual acuity in the right eye
Name va_right_gprd
Chapter Diseases of the eyes and ears/Visual acuity
Definition
Visual acuity from GPRD structured data area and Read codes. Definitions as for gprd_va_rightcode, and use the value of gprd_va_rightcode derived for the same event.
Data Type Categorical
Data sources GPRD
Repeated Yes
Valid event date range 01/01/1900 - 25/03/2010
Agreed 20/09/2012 (Revision 1)
Category Definition
0 Data Not Entered
1 Normal
2 Reduced visual acuity (VA 6/12 to 6/36)
3 Sight impaired (VA 3/60 to 6/60)
4 Severely sight impaired (VA worse than 3/60)
Implementation
Entity type 134 contains information about visual acuity in the data1 field. If

the Read code has another entity type, the data fields are ignored and the visual acuity is

deduced from the Read term, otherwise the information in the Read term is checked