Chart display device for visual acuity tests

A chart display device for a visual acuity test includes a chart display optical unit that emits a chart image generated by a chart display optical system to a front, and is rotatably coupled to a frame of the chart display device via a rotation shaft; a position indicator light source that indicate...

Full description

Saved in:
Bibliographic Details
Main Authors Kim, Chang Sung, Seo, Young Duk
Format Patent
LanguageEnglish
Published 20.08.2024
Subjects
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEDICAL OR VETERINARY SCIENCE
SURGERY
Online AccessGet full text

Cover

More Information
Summary:A chart display device for a visual acuity test includes a chart display optical unit that emits a chart image generated by a chart display optical system to a front, and is rotatably coupled to a frame of the chart display device via a rotation shaft; a position indicator light source that indicates the height of an eye to be examined and emits a position identification light; a position detection sensor that detects the position identification light emitted from the position indicator light source, and thus detects the height of the eye to be examined; and a rotation driving unit that rotates the chart display optical unit around the rotation shaft, and thereby tilts an emission direction of the chart image so that the chart image emitted from the chart display optical unit is emitted in the direction of the eye to be examined.
Bibliography:Application Number: US202117533298