Certified Ophthalmic Technician (COT). The Certified Ophthalmic Technician is the second core designation level confirming knowledge in 19 specific content areas specifically designed to test the certified ophthalmic assistant or program graduate who intends to advance their career in the eye care field.
The original spinning jenny used eight spindles instead of the one found on the spinning wheel. A single wheel on the spinning jenny controlled eight spindles, which created a weave using eight threads spun from a corresponding set of rovings. Later models had up to one-hundred and twenty spindles.
Why is the spinning called the spinning jenny? It is called the 'Spinning Jenny' because in the 1700s James Hargreaves had a daughter called Jenny and she knocked over the family spinning wheel and it gave Hargreaves the iâ¦dea to make his invention. And since Jenny had knocked over the family wheel and gave him this idea, he named it after her.