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.
The drop ball, which adds a little spin to your pitch, places your grip directly on the seams of the softball. Place your most powerful finger along the ball's topmost seam as it faces out from you. Drive the ball downward with this finger as you release it, causing it to spin as it is propelled toward the batter.