What shall they do with their eyes during meditation? It is best for beginners to shut them entirely and thus avoid distracting sight-impressions from the outer world. For moderately advanced practisers it is better to begin with shut eyes and at an appropriate point sometime later in the meditation, to half-open them, directing the gaze downwards and some feet beyond, and to keep it so until the meditation period is ended. But it is easiest for highly advanced proficients to pass quickly through the earlier positions of shut and half-shut and then, at a time prompted for them by inward guidance to keep their eyes open fully until the practice period is over, or until the guidance reverses itself. These are the general rules governing the three chief degrees.
-- Perspectives > Chapter 4: Elementary Meditation > # 32