The VISAGRAPH is an eye movement recording system that measures reading efficiency. It gives us information concerning reading speed, eye posture, eye-synchronization and eye movements while reading. The instrument uses goggles with built-in infrared sensors that track eye movements while reading an age-appropriate passage. The results give us information about possible visual, perceptual and language-based difficulties that may hamper the reading process.

COLOURIMETRY is a technique used to assess the potential relief of visual stress by means of coloured lenses. Some patients with slow and inefficient reading also suffer from strain, fatigue and discomfort while reading. Some also report glare and distortions and even report shimmering and shadowing of the lines of printed text. These patients may benefit from specifically selected coloured lenses for reading.