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.
Good question. Rotors are discs that your brake pads clamp down on in order to stop your car. In other words, they're pretty important. Why they may cause the steering wheel to shake when braking requires a quick review of how rotors work. Rotors are usually made of metal and function at a specific width, depending on the make and model of your vehicle.