The machine vision company's near-term outlook remains weak, but its long-term prospects are undiminished. Shares in machine vision technology company Cognex Corporation (CGNX 1.02%) fell by 18.6% in August, according to data provided by S&P Global Market Intelligence. There's no debate about the catalyst for the move. Cognex's second-quarter earnings report disappointed the market on the last day of July, and the stock declined heavily on the first day of August. Near-term weakness Machine vision technolog ...