The Kaleidos is a binocular mobile refractometer and vision analyzer that measures the refraction of both eyes and discovers other ocular impairments. The device serves as a darkroom and allows the exam to be performed in any light condition: while the patient looks inside of it, the system automatically detects refractive errors in less than three seconds. The Kaleidos measures objective refraction in the range of -15D to +15D, and phorias/tropias in prismatic diopters, as well as other additional features.