The terms retinal migraine and ocular migraine are often confused with visual migraine, which is a far-more-common symptom of vision loss, resulting from the aura phase of the common migraine. The aura phase of migraine can occur with or without a headache.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  mentalism(Noun) The doctrine that physical reality exists only because of the mind's awareness. 2  mentalism(Noun) Activities such as mind reading, especially when used by performers.
Existentialism. Existentialism is a catch-all term for those philosophers who consider the nature of the human condition as a key philosophical problem and who share the view that this problem is best addressed through ontology.n this article, however, it is assumed that something sensible can be said about existentialism as a loosely defined movement. The article has three sections. First, we outline a set of themes that define, albeit very broadly, existentialist concerns.