Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1980-01-28
1982-10-12
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
351 32, A61B 302
Patent
active
043536263
ABSTRACT:
Visual recognition testing apparatus is described which has a master array of individually selectable areas to be illuminated and a slave array of individual areas to be illuminated. A test sheet can be superimposed in front of the two arrays so as to show two sets of the same shapes differently arranged. The apparatus provides a controlled sequence of illumination of the shapes of a master array one after the other in response to correct choosing of corresponding shapes in the slave set of shapes by means of illumination of a chosen area of the slave array. A pupil controls illumination of the areas of the slave array and selection of a matching shape by settling on a chosen area of the slave array by the use of one or two switches. The apparatus processes the information conveyed by the use of these two switches in accordance with a given mode of operation and produces a decision indicating whether or not a correct choice has been made based upon comparison of the addresses of the illuminated areas of the master and slave arrays at choice by the pupil, comparison being effected by means of comparator means and teacher selected interconnections between two sets of terminals corresponding to the master and slave arrays. Success is communicated to the pupil by generation of a tune and failure by generation of a buzz. The addresses of the master and slave areas prevailing when a mistake is made are stored in a FIFO memory which is adapted to recall these mistakes at the arrays in response to a review signal after a test has been completed. The apparatus is particularly adapted for use with pupils suffering from damage or deficiency of the nervous system.
REFERENCES:
patent: 4239351 (1980-12-01), Williams et al.
Bovernick Rodney B.
Corbin John K.
O'Connell Robert F.
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