ARLINGTON -- Coco Crisp took the field on Tuesday and hit in the cage, a positive development for the A's leadoff hitter and center fielder who has missed seven games with allergic conjunctivitis in his eyes. "He's better today," A's manager Bob Melvin said. "He sees out of his left eye pretty well. Right eye is the bigger issue right now. He took some swings in the cage today."Crisp looked better in the clubhouse. His eyes are less puffy. He took to the field on Tuesday and ran around a bit during batting practice. When a ball was hit near him he reacted and tracked the trajectory in flight. He didn't have a glove on at the time but it was clear he could see the baseballs being hit in his direction. "This is kind of the day we were targeting to get him some baseball activity," Melvin said. "Where it goes from here we're not sure yet. It's certainly more encouraging than we were potentially thinking yesterday."The A's are 62-43 with Crisp in the lineup and 24-25 when he doesn't play. With nine games left in the season the A's will have to hope he can return soon. There still has to be some concern that he will struggle with timing at the plate with this many games off. Crisp is hitting .251 with 10 home runs and 42 RBI this season. He leads the team with 35 stolen bases and is tied for fifth in the American League with seven triples. His speed is very important to the A's. In his three years with Oakland he has been successful in 89.7 percent (116 for 132) of his stolen base attempts, which is the best mark in franchise history.