[The blind spot: a critical review of the value of scanning perimetry in scotoma of known size].

Using programs 33 and 34 of the Octopus 2000 automated perimeter the field within 30 degrees was examined in 20 normal eyes: The blind spot was rarely missed (2 X), quite often interpreted as a relative scotoma (21 X), less frequently as a small absolute scotoma (7 X) or as an absolute plus relative scotoma (10 X). These findings are also valid for all scotomas of equal or of smaller size located elsewhere within the examined field.