It's a phenomenon when the eyes see what the mind believes.
Evidently, "scoptoma" is a misuse of the word "scotoma," a word used in medicine for a condition that causes visual blind spots, and in psychology to describe a mental blind spot -- the inability to understand or perceive some matters.
There is no linguistic authority, such as a reputable dictionary, medical or otherwise, that identifies or defines the word "scoptoma."
"Scoptoma" is not a recognized medical term. It is possible that you might have meant "scotoma," which refers to a blind spot in the visual field, commonly caused by conditions such as glaucoma or migraines. If you have concerns about vision changes or blind spots, it is important to consult with a healthcare professional for an accurate diagnosis and appropriate treatment.