IEEE 802.3: 10GBASE-ER Receiver Eye Mask?

[bhj99]

Hi all, does anyone know where I can find the receiver eye mask characteristics within IEEE 802.3 for a 10GBASE-ER interface? I see transmitter eye mask definition, but not much else. I want to perform a 10G signal integrity analysis from the output of a retimer chip to an SFP+ transceiver that supports 10GBASE-ER. Any info is appreciated!