No it's actually correct. This is not like our typical examinations where we assume the patient to be sitting in front of us.. You have to imagine yourself sitting at the oct machine and think about the orientation. When you do so...the left rnfl thickening means the disc is that side... And it's is the left eye that the disc is going to be on the left side.( as we know the disc is nasal ) To put things into perspective here is a image images.app.goo.gl/pBqtEFA4UH2wqMr36