Yiqun Geng，Hongling Chen，Lifang Liu，Hongjie Lin，Mingzhi Zhang

Central Laboratory of Shantou University，．Chinese Universtiy of Hong Kong Joint Shantou International Eye Center， Shantou 515041， China

Materials and methods

Experimental animals

Visual electrophysiology

Statistical analysis

Results

Table 1 The amplitude of ERGs in rats between young and old rats （Mean±S．D．）

Table 2 The latency of ERGs in rats between young and old rats （Mean±S．D．）

Discussion