Bifocal glasses are a type of Multifocal. Bifocal lenses are sectioned and correct both near and far vision.
Blended lenses gradually blend the varying magnifications needed to correct different types of vision in a prescription lens.
Blurred vision is a common eye condition that prevents the eye from focusing, making it difficult to see the finer detail of an object. If you are experiencing blurred vision you should book an eye exam.