Sample ERG recordings. Sample ERG recordings. The left graph shows an LR-infused eye showing subnormal ERG (b-wave below 200 μV) after 48 hours. The right graph shows a normal amplitude ERG after 48 hours using BSS solution. BSS, balanced salt solution; ERG, electroretinography; LR, Lactated Ringers. Hisham AbdEl Dayem et al. BMJ Open Ophth 2017;1:e000004 © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.