33
/es/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
5200000
491465
2
Public Timelines
Menu
Public Timelines
FAQ
Public Timelines
FAQ
For education
For educational institutions
For teachers
For students
Cabinet
For educational institutions
For teachers
For students
Open cabinet
Crear
Close
Create a timeline
Public timelines
Library
FAQ
1 ene 1840 año - Pince- nez with spring bridges invented 1840
Añadido al timeline:
The development of optometry through the ages
By
Christian Pot
10 abr 2021
0
0
766
fecha:
1 ene 1840 año
Ahora mismo
~ 185 years ago
About & Feedback
Acuerdo
Privacidad
Biblioteca
FAQ
Support 24/7
Cabinet
Get premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL
