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Yes, at least at the most basic level.
The only thing we know for sure is his brain “senses” the difference between light and dark. This was proven in an EEG test called “Evoked Response” where they flashed bright lights into his eyes and his brain’s visual lobe responded (i.e., increased brainwave activity). The first time the was done a few months after the attack, they response/reaction was slow to relay the message from his eyes to his brain. Over the years it is improving.
Beyond this, we know no more.
Visual Testing (Evoked Response Potential) during qEEGThere is no way for an EEG Evoked Response test to determined how much detail Ryan’s eyes are picking up… if any at all. It could be that everything is blurred and fuzzy; where only general shapes can be seen. He might, in fact, only sense light and dark… and nothing more.
It’s better than nothing, right? Not necessarily. It could very well be that his sight only reaches the visual cortex and stops there… never reaching the cerebral cortex. In other words, not able to process what being seen; effectively rendering him blind because it means nothing.
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