ES12224U - Ring-disk as a base optotype for a universal scale to measure visual acuity. (Machine-translation by Google Translate, not legally binding) - Google Patents

Ring-disk as a base optotype for a universal scale to measure visual acuity. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES12224U
ES12224U ES0012224U ES12224U ES12224U ES 12224 U ES12224 U ES 12224U ES 0012224 U ES0012224 U ES 0012224U ES 12224 U ES12224 U ES 12224U ES 12224 U ES12224 U ES 12224U
Authority
ES
Spain
Prior art keywords
ring
optotype
translation
machine
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
ES0012224U
Other languages
Spanish (es)
Other versions
ES12224Y (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to ES0012224U priority Critical patent/ES12224Y/en
Publication of ES12224U publication Critical patent/ES12224U/en
Application granted granted Critical
Publication of ES12224Y publication Critical patent/ES12224Y/en
Expired legal-status Critical Current

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  • Eye Examination Apparatus (AREA)

Abstract

A disc-ring, applicable as base optotype, for measuring visual acuity, essentially characterized by each optotype being constituted by a ring or circular ring of black color, inscribed ideally in a square whose side is divided into five equal parts, the thick of the ring equal to one of these parts, existing in the center of the ring a black disc with a diameter equal to the size of a fifth of the side, the mentioned ring being interrupted by a soft disc, whose diameter is analogously to the aforementioned fifth part from the side of the main square. (Machine-translation by Google Translate, not legally binding)
ES0012224U 1945-11-23 1945-11-23 Ring-disk as a base optotype for a universal scale to measure visual acuity. Expired ES12224Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES0012224U ES12224Y (en) 1945-11-23 1945-11-23 Ring-disk as a base optotype for a universal scale to measure visual acuity.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES0012224U ES12224Y (en) 1945-11-23 1945-11-23 Ring-disk as a base optotype for a universal scale to measure visual acuity.

Publications (2)

Publication Number Publication Date
ES12224U true ES12224U (en) 1945-12-16
ES12224Y ES12224Y (en) 1946-11-16

Family

ID=51076341

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0012224U Expired ES12224Y (en) 1945-11-23 1945-11-23 Ring-disk as a base optotype for a universal scale to measure visual acuity.

Country Status (1)

Country Link
ES (1) ES12224Y (en)

Also Published As

Publication number Publication date
ES12224Y (en) 1946-11-16

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