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Acadia Associates Patents |
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Assignee: Acadia Associates
Address: Durham, NC
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4155632 |
Method and apparatus for testing vision |
May 22, 1979 |
| The disclosure relates to a method and apparatus for testing eyesight in the presence of controlled varying degrees of contrast at a target which is being viewed. The contrast ratio of the illumination of the portion of a target having a series of test patterns with respect to the illumi |
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