Attention visual field
program

Référence: PVM-UF

Driving requires the quick consideration of a great number of visual information. The attention visual field examination aims at the determination of visual attention alterations which are said to be strongly correlated to road accidents according to many studies (BALL & all, 1988, BALL & al, 1993, GABAUDE, 2003, MOESSINGER, 2002).

This examination main application is the evaluation of the aptitude for driving vehicles:

• with a visual sensorial deficiency, to determine the subject ability to compensate this deficiency
• for the early outreach of cognitive effects that can be associated with cerebrovascular accident or Alzheimer disease (RUBIN & al, 1999)

Note: interest of the "attention" visual field with respect to the "classic" visual field

The "classic" visual field consists in the detection by a motionless eye of luminous targets in the periphery. It essentially points out the sensorial deficiencies and may "miss" the cognitive deficiencies. Moreover some sensorial deficiencies may be compensated by eye gaze strategy.

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Simple attention

The subject indicates with a level the direction of an arrow. Performance is evaluated from the number of correct responses and from the response time.

Divided attention

The subject indicates with a level the direction of an arrow and simultaneously pushes a press button when an object appears in the peripheral visual field.

Selective attention

It is identical to the previous examination but this time many distractors appear in the peripheral visual field.

The results of the examination three phases include:

• for simple attention: the number of correct responses compared to the number of presentations and the average response time.
• for divided attention: the number of correct responses compared to the number of presentations and the average response time for central and peripheral tasks. Tests seen in the periphery are indicated in green and in red if not.
• for the study of selective attention (with distractors): the number of correct responses compared to the number of presentations and the average response time for central and peripheral tasks. As in the previous phase, the tests seen in the periphery are indicated in green and in red if not.

Example of attention visual field in a patient with non compensated hemianopia

Vision Monitor systems compatible with this program:

• MonCV3: multifunction perimeter
• MonPack3: standard visual electrophysiology