Patent · US Active

Eyesight testing device

US8827451B2 · kind B2 · utility

3Cited by

5References

21Claims

0Family size

Assignee

Carl Zeiss Vision International GmbH · DE

Inventors

Jesús-Miguel Cabeza Guillén · Aalen, DE
Michael Gamperling · Leipheim, DE
Matthias Kubitza · Aalen, DE

Key dates

Filing date	Dec 21, 2012
Grant date	Sep 9, 2014
Priority date	—
Expiry date	Dec 21, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG02B30/36
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

An eyesight testing apparatus examines associated heterophoria of the eyes of a subject. The apparatus includes an image generation device having a display unit for generating test patterns for display to the eyes. An optical assembly is arranged on that side of the display unit facing the eyes. This assembly separates light supplied by a first group of selected zones of the display unit from light supplied to a beam path by a second group of selected zones of the display unit. The left eye only receives the light from the first group. The light from the second group only passes to the right eye. The optical assembly includes a prism matrix having a multiplicity of prism portions extending in the vertical direction and each having a lens-shaped region with a convex surface facing the display unit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.