Figure 1From: From line to dots: an improved computerised rod and frame system for testing subjective visual vertical and horizontalThe computer rod and frame test. a) Screen display with rod as line, frame tilted +18°, rod +20°; b) Rod as dots display, frame tilted -18°, rod -20°; c) Distribution of unsigned positioning errors to vertical and horizontal with rod as line (n = 104).Back to article page