| Type | MGI:General | Description | labeling for Grm6 (post-synaptic marker) and Bsn (pre-synaptic marker) is reduced in the outer plexiform layer and Bsn or co-localization of both markers is sometimes seen in the outer nuclear layer rod synaptic terminals are abnormal lacking bipolar and horizontal cell invaginations into the synaptic terminal and almost all synaptic ribbons are absent |
