A local sheep farmer calls you to investigate an eye problem…

A local sheep farmer calls you to investigate an eye problem he is having in his lambs. The lambs are mostly 2-3 days old and the problem seems to affect both eyes. The eyes have excessive tearing and the lambs hold their eyes almost closed. It is hard to visualize the eyes but the corneas do appear cloudy. The owner thinks that the problem starts when they are about 1 day old. He has treated with antibiotics but hasn’t seen any improvement. You are suspicious that this is a case of: