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.
A positive impact is that the spinning jenny could make clothes faster and easier, by making multiple spools of yarn at a time. A negative impact is that spinning wheel makers were angry at the inventor, James Hargreaves, because they could go out of business if the spinning jenny became a common item.It is said that some of the makers of the spinning wheel sabotaged Hargreaves machines, and Hargreaves fled.Obviously, the Industrial Revolution had both good and bad sides.  The Industrial Revolution of the 19th century made an overall  positive impact on Western society.