title: Accurate two-dimensional eye tracker using first and fourth Purkinje images.
mesh_terms: D001698:Biomedical Engineering; D005069:Evaluation Studies as Topic; D006801:Humans; D007259:Infrared Rays; D007908:Lens, Crystalline / Q000502:physiology*; D009799:Ocular Physiological Phenomena; D009885:Ophthalmology / Q000295:instrumentation*; D010775:Photic Stimulation; D012399:Rotation; D014796:Visual Perception