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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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1 gen 1862 anni - Snellen develops his visual acuity chart and Snellen notation 1862
Aggiunto al nastro di tempo:
The development of optometry through the ages
By
Christian Pot
10 apr 2021
0
0
764
Data:
1 gen 1862 anni
Adesso
~ 163 years ago
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