Moon gaze
In this one night I see more than the sun has ever revealed to me. The innumerous shades of greenish–blue ink, the whispers of black moths. My eyes are one with the moon, opening the single, but bright eye. I see it! I see it all!
Causes
The exact origin of the condition remains unclear but all cases were observed in the vicinity of Gáláwá Lake and only after the Flood.
Symptoms
The moon gaze manifests by an increased bleaching of the iris and hazing of the cornea, slowly taking resemblance of a full moon. The affected don't lose their sight — in fact in the first weeks, when the moon is rising they see more than an average eye would see during the night. Shortly after the apex, which overlaps with the full moon, their senses rapidly degrade. First comes the sight and with it the onset of madness. The train of thoughts becomes chaotic and difficult to follow. By then a moon gazed person finds themself attracted towards places with significant depth and very often shine, e.g., the surface of the lake. Obsessed with chasing after the moon, they eventually drown.
I know you said this is just a stub, so I'm looking forward to seeing more detail about this. Your descriptions of the symptoms are chilling, and I love the link with the blind catfish. And the song too!
This part is crucial for one of the main characters, so there will be more. I think it deserves a closer look and details about how it evolves through the month. I'm glad you like it. There should be a positive side to the condition, but...