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| ESRA Consulting Corporation offers proprietary technologies and software associated with mass vision and/ or cognition screening among other applications. |
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| Google PR |
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| Site with free vision tests, animations of the eye, optical illusion tests, and library of terms, to interact with and learn from. |
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| Google PR |
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| Vision tests developed by Lea Hyvarinen, M.D., including the LEA symbols for children. |
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| Google PR |
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| Developed by optometrists, vision scientists and programmers at EyeLab (UK) Ltd. in 1991Approved by 'The Royal College of Ophthalmologists', UK, and has been in use as an office vision-screening system since 1992. |
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| Google PR |
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