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INDEPTH Study on Global Ageing and Adult Health 2007
Wave 1

Ghana, 2007
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Reference ID
GHA_2007_INDEPTH-SAGE-W1_v01_M
Producer(s)
Navrongo Health Research Centre
Metadata
Documentation in PDF DDI/XML JSON
Study website
Created on
May 19, 2023
Last modified
May 19, 2023
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29947

Q2514: Distance vision left eye (q2514)

Data file: INDEPTHGhanaINDData

Overview

Valid: 0
Invalid: 0
Type: Discrete
Decimal: 0
Width: 14
Range: 0.629999995231628 - 9
Format: Numeric

Questions and instructions

Question pretext
To measure acuity in the left eye, the right eye is covered with right palm or an eye patch and the subject is asked to respond to each "E" in a row slowly, row by row, with your guidance. Only one reading of a given "E" is allowed. When the subject has difficulty, he or she is encouraged to guess. Responses can be verbal (Up, Down, Left, Right) or the respondent can indicate with a finger like in the training video.
The right eye can then be tested in the same way. Visual acuity in each eye can be recorded as explained in the Interviewers Manual.
Literal question
Distance Vision - Left Eye
Categories
Value Category
9 Not applicable
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
Interviewer instructions
INTERVIEWER: Invite the respondent to sit again - in a chair positioned so that the respondent's head will be 4 meters from the eye chart. Make sure the person does not lean in closer to the chart during the test.
Distance vision
INTERVIEWER: Start with the distance vision chart - using the 4 metres measured out for the timed walk. If the respondent makes more than 2 errors in one row, and reads all letters in the row, their result is read as the previous row. Select and record the result from the column labeled "DECIMAL" on the left side of the chart.

Description

Definition
We are now going to test your distance vision and near vision.
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