: Data-Field 6147

Data-Field 6147

Description:	Reason for glasses/contact lenses
Category:	Assessment centre ⏵ Touchscreen ⏵ Health and medical history ⏵ Eyesight
	Health outcomes + Self-reported medical conditions

Participants

190,314

Value Type

Categorical (multiple)

Both sexes

Jan 2012

306,515

Data

Defined (4)

Aug 2025

Complete

Primary

Yes (6)

o1 s1

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Data

306,515 items of data are available, covering 190,314 participants, encoded using Data-Coding 100514.
Defined-instances run from 0 to 3, labelled using Instancing 2.
Array indices run from 0 to 5.

Graph illustrating main data

4 Instances

Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
106,501 participants, 132,919 items
Graph illustrating main data

Instance 1 : First repeat assessment visit (2012-13)
19,097 participants, 24,456 items
Graph illustrating main data

Instance 2 : Imaging visit (2014+)
95,020 participants, 123,717 items
Graph illustrating main data

Instance 3 : First repeat imaging visit (2019+)
19,650 participants, 25,423 items
Graph illustrating main data

Notes

ACE touchscreen question "Why were you prescribed glasses/contacts? (You can select more than one answer)"

The following checks were performed:

If code -1 was selected, then no additional choices were allowed.
If code -3 was selected, then no additional choices were allowed.

Field 6147 was collected from participants who indicated they wear glasses or contact lenses to correct their vision, as defined by their answers to Field 2207

8 Related Data-Fields

Field ID	Description	Relationship
2207	Wears glasses or contact lenses	Current Field was collected from participants who indicated they wear glasses or contact lenses to correct their vision, as defined by their answers to Field 2207
5408	Which eye(s) affected by amblyopia ( ...	Field 5408 was collected from participants who indicated they wear prescribed glasses or contact lenses to correct their amblyopia, as defined by their answers to Current Field
5855	Which eye(s) affected by astigmatism	Field 5855 was collected from participants who indicated they wear glasses or contact lenses to correct their astigmatism, as defined by their answers to Current Field
5832	Which eye(s) affected by hypermetrop ...	Field 5832 was collected from participants who indicated they wear glasses or contact lenses to correct their hypermetropia, as defined by their answers to Current Field
5843	Which eye(s) affected by myopia (sho ...	Field 5843 was collected from participants who indicated they wear glasses or contact lenses to correct their myopia, as defined by their answers to Current Field
5877	Which eye(s) affected by other eye c ...	Field 5877 was collected from participants who indicated they wear glasses or contact lenses to correct their other type of eye condition (not myopia, hypermetropia, presbyopia, astigmatism, strabismus o
5610	Which eye(s) affected by presbyopia	Field 5610 was collected from participants who indicated they wear glasses or contact lenses to correct their presbyopia, as defined by their answers to Current Field
6205	Which eye(s) affected by strabismus ...	Field 6205 was collected from participants who indicated they wear glasses or contact lenses to correct their strabismus, as defined by their answers to Current Field

2 Resources

Preview	Name	Res ID
	Screenshot from touchscreen questionnaire used to capture field 6147	100515
	Touchscreen questionnaire ordering, validation and dependencies	113241

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