| Hi, quiete impossible to say something without seing the eye in natural condition and with an ophtalmoscope.
If the spot is just superficial on the cornea, it will help to put a little iodine tincture (1/3 dilution) but carefuly after a smouth scraping.
If there is a collection bewind the cornea there is only a chirurgical treatment by a specialist, you should try to find a vet who operate eyes, I'm sure he will be interested to treat a fish..
If you suspect an infection because the spot is growing fast, you should inject some antibiotics like Nuflor or Marbocyl (fluoroquinolone).
The origin could be a trauma, a virus or even a metabolic problem with lipid collecting inside the eye.
Anyway, if the spot doesn't affect the koļ and doesn't grow, I would do nothing.
Goood luck, Marco |