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.
Plate spinning. Plate spinning is a circus manipulation art where a person spins plates, bowls and other flat objects on poles, without them falling off. Plate spinning relies on the gyroscopic effect, in the same way a top stays upright while spinning. Spinning plates are sometimes gimmicked, to help keep the plates on the poles. Many Chinese acrobatics troupes feature plate spinning, usually in combination with contortion or acrobatic skills.