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Title

Definition of an absolute scotoma in the central visual field for driver license

Purpose	The latest update of the criteria for driver license stipulate that the binocular central 20° (Group 1) or the binocular central 30° (Group 2) should be free of an absolute scotoma. However, no definition of an absolute scotoma is provided. To provide guidelines for the ophthalmologists for the definition of an absolute scotoma when validating a driver license.
Methods	A literature search was conducted to look for definitions of an absolute scotoma in the central visual field in relation to driver licences.
Results	An absolute scotoma in the central 20° or 30° of the binocular visual field should be examined with standard automated perimetry using the Esterman program or any other form of automated perimetry that allows to integrate the monoculair visual fields . The definition we propose: a minimum of 3 contiguous test locations, maximum 6° apart with a threshold of < 10 decibel (dB) in the binocular central visual field.
Conclusion	Criteria for the definition of absolute scotomas in relation to a driver license are proposed and will be implemented in collaboration with CARA.

Authors 1

Last name	STEVENS
Initials	AM
City	Gent

Authors 2

Last name	ZEYEN
Initials	T

Authors 3

Last name

Belgian Glaucoma Society