noun / verb
blur
BLUR/blɜːr/
Something unclear or the act of making or becoming unclear.
The flower appears as a blur through the frosted glass.
Etymology
Blur developed from a stain or smear into “confused dimness”: something lacking clear outlines, whether seen or remembered. This change of meaning is documented even though the word’s deeper origin is uncertain.
In context
a migraine this is also another one that you wouldn't really think of can cause a sudden blur to your vision in one eye