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13h 56min, jan 1, 1862 y - Snellen charts are designed for vision tests

Description:

Source: The History of Special Education: From Isolation to integration

Added to timeline:

2 months ago
0
0
44
EDU 232 B Timeline Project
Fall 2018 Timeline Project. Emma Champion.

Date:

13h 56min, jan 1, 1862 y
Now
~ 157 years ago
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