33
/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
5199999
491465
2
Public Timelines
Public TimelinesFAQ
Public TimelinesFAQ
For educational institutions For teachers For students Cabinet
For educational institutions For teachers For students Open cabinet
Create
Create a timeline
Public timelines
Library
FAQ

jan 1, 1826 - Engineer John Isaac Hawkins patents trifocals 1826

Added to timeline:

The development of optometry through the ages

ByChristian Pot
10 Apr 2021
0
0
759

Date:

jan 1, 1826
Now
~ 199 years ago
About & FeedbackTermsPrivacyLibraryFAQ
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL