A ring type medical vision detection device

Abstract

The invention discloses a ring type medical eyesight test device which comprises a circular panel, wherein a plurality of circular concave holes are formed in the front surface of the panel; the circular concave holes are distributed in the panel in a column; a plurality of annular grooves concentric with the panel are formed in the back surface of the panel; each of the annular grooves communicates with each concave hole; an annular rotating ring is plugged into each annular groove of the panel; a plurality of C-shaped characters with different sizes and different opening directions are formed on the front surfaces of the rotating rings; a limiting check ring with a rightwards inverted U-shaped section is fixed on the panel between two adjacent annular grooves; the limiting check rings press against the rotating rings; shifting blocks are formed on the back surfaces of the rotating rings; an arc-shaped bracket is formed at the bottom of the panel; an arc-shaped supporting leg is plugged into the bracket; the middle part of the supporting leg is hinged to the bracket through a bolt. The ring type medical eyesight test device is simple in structure; eyesight test characters are not hermitically distributed on an observation interface, so that the ring type medical eyesight test device is applicable to eyesight test for some persons with trypophobie.

Description

Technical field: [0001] The invention relates to the technical field of medical vision detection devices, and more specifically relates to a ring type medical vision detection device. Background technique: [0002] An eye chart is a chart used to measure vision. The eye chart used in medical testing mainly checks the central vision, that is, checks the central visual acuity in the macular area of ​​the retina, so that the preliminary situation of visual function can be learned simply and quickly, which is of great significance for the clinical diagnosis and treatment of eye diseases. The existing visual acuity includes international standard visual acuity chart, logarithmic visual acuity chart, and Langer's ring visual acuity chart, but the test symbols of these visual acuity charts are generally densely distributed on one chart. , its existing eye chart detection is just inconvenient. Invention content: [0003] The object of the present invention is to address the shor...

AI Technical Summary

Problems solved by technology

The existing visual acuity includes international standard visual acuity chart, logarithmic visual acuity chart, and Langer's ring visual acuity chart, but the test symbols of these visual acuity charts are generally densely distributed on one chart. , its existing eye chart detection is inconvenient

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