Hi, Thanks for writing in. The balance mechanism in humans is taken care of by the cerebellum which is a structure in the back of the brain and also by the vestibular system located in the inner ear. As you are experiencing disturbances in balance when bending down, it might be that the hair cells in the inner ear are getting disturbed and this causes moments of dzziness and inability to balance yourself. Vision is also connected to the vestibular system and hence you are having associated symptoms including blurred vision. You might have to get tests for studying any abnormality involving the vestibular apparatus which is part of the inner ear. Electronystagmography (ENG) or videonystagmography (VNG) done to record abnormal eye movements while your head is placed in different positions or your balance organs are stimulated with water or air. For this you might consult the ENT specialist.