1. Module: Primary eye care screening
  2. Lesson 4: How to carry out a vision screen
  3. Rubrique 2 sur 5

Preparing to carry out a vision screen

Progression de la rubrique :

Vision charts

For adults and children over three years old, vision screens are carried out using vision charts.

There are three different vision charts:

  • HOTV chart – for children eight years and younger
  • Distance E-chart – for children older than eight years, and adults
  • Near E-chart – only used for adults 40 years and older.

Instruction

If you haven’t already, download and print the HOTV chart and pointing card, distance E-chart and near E-chart.

Échelle comportant deux lignes de lettres. La ligne supérieure à grandes lettres (6/60) indique V, O, H, T. La ligne inférieure à petites lettres (6/12) est délimitée par un rectangle et indique V, H, T, V, O.

Échelle comportant deux lignes de E. La ligne supérieure (6/60) comporte quatre E dont les pattes sont orientées vers le haut, la droite, la gauche et le bas. La ligne inférieure (6/12) est encadrée par un rectangle et comporte cinq E dont les pattes sont orientées vers le bas, la droite, le haut, le bas et la gauche.

Chart with one line of five small ‘E’s with legs facing right, up, left, up and down. ‘N6’ is next to the ‘E’s indicating their size.

Equipment

To carry out a vision screen you will need:

  • Correct vision chart – HOTV chart and pointing card, or distance E-chart and near E-chart
  • Occluder (optional) – to cover each eye. The palm of a hand can be used instead
  • A space which is well lit with no direct sunlight or glare
  • Tape measure or a three-metre piece of string to measure the testing distance
  • Tape to stick the vision chart on the wall, and to mark the testing distance on the floor
  • A chair for the person.

Un objet en plastique composé d'une poignée et d'une extrémité ronde.

Tape measure with a grey casing and a yellow measuring tape partially extended.

Préparez la salle

  • Attach the HOTV or distance E-chart at the correct height on a wall. The chart should be positioned at eye level for the person when they are sitting on the chair.
  • Position chair at the correct distance. Measure three metres from the vision chart to the back of the chair.

Conseil

Place tape in front of the front legs of the chair to mark the position. This is in case it is moved accidentally.

A health worker measuring three metres from vision chat to chair using measuring tape.

Instruction

Watch the video of how to set up the screening space for a distance vision screen.

Activité

Entraînez-vous à préparer une salle en vue d'un test de la vision de loin.

  1. Rassemblez le matériel et vérifiez son fonctionnement.
  2. Position the chart at the correct height
  3. Placez la chaise à la bonne distance.
  1. Module: Primary eye care screening
  2. Lesson 4: How to carry out a vision screen
  3. Rubrique 2 sur 5