The Los Angeles Business Journal’s index of the largest local public companies rose for the week. The weighted LABJ index climbed 2 percent to close at 230, with winners outpacing gainers 84 to 66. Seven companies closed the week unchanged.

Among stocks trading above a dollar, Sylmar’s Second Sight Medical Products Inc., a maker of an artificial retina for blind patients, was one of the week’s leading gainers. Shares rose 11 percent to close at $13.47 on Friday after the company announced the first successful implant of a new model in an animal study.

Implantable lens maker Staar Surgical Co. also had a good week. Shares rose 15 percent to close at $8.36.

Agricultural biotech Ceres Inc. was among the week’s losing stocks. Shares fell 21 percent to close the week at $2.10 after the company announced a 1-for-8 reverse split of its common stock this week.