Interest in measuring peripheral refraction rapidly and accurately has been stimulated by increasing evidence that the
eye's peripheral refractive state can influence axial growth. In response to this, a new clinical instrument, the
EyeMapper, was developed which performs quasi real-time global (central and peripheral) refraction measurements of
the human eye. The EyeMapper is an aberrometer comprising a unique deflection system to permit an extremely rapid visual field scan.
Refraction measurements are taken from -50° to +50° in 10° steps within 0.45 seconds. Multiple pupil imaging paths
through the deflection system provide improved lateral and axial pupil alignment, and by rotating the instrument around
its main optical axis, global power maps of the eye can be generated.
Using a model eye with a pivoting and translating reflective surface to simulate the peripheral and central retina, the
EyeMapper was cross-validated against a conventional aberrometer (COAS-HD, Wavefront Sciences, USA) and an
autorefractor (Shin-Nippon NVision K5001, Japan). In addition, the right eyes of ten participants were measured across
the horizontal visual field and in one eye, refraction measurements were performed globally. Overall, the EyeMapper
showed good agreement and improved repeatability when compared to the other two instruments.