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.
1 Spinning â Spinning rods can usually do the same things that a casting rods does, they simply use a different reel â a spinning reel. 2  Spinning equipment can cast a lighter lure and is not subject to the backlash problems that an inexperienced angler encounters with a casting reel. Spinning â Spinning rods can usually do the same things that a casting rods does, they simply use a different reel â a spinning reel. 2  Spinning equipment can cast a lighter lure and is not subject to the backlash problems that an inexperienced angler encounters with a casting reel.