<unk>  is a<unk>  which is not characterized by true vertigo and it can be replicated by hyperventilation and psychiatric symptoms that usually precede its onset. It occurs in anxious or phobic individuals and do not include any specific symptoms. A new proposal narrowly defines<unk>  as the<unk>  which occurs exclusively in combination with other symptoms as part of a recognized psychiatric symptom cluster and this symptom cluster is not itself related to vestibular dysfunction.<unk>  should not be confused with the phenomenon of<unk>  overlay where the preexisting nucleus of nonpsychiatric<unk>  is augmented by psychiatric factors that occur along with them. None of the personality disorders (DSM-IV Axis II psychiatric disorders) are characterized by<unk>  or imbalance and thus they do not justify a diagnosis of<unk> .
Psychogenic dizziness
Benign positional vertigo 
Benign paroxysmal positional vertigo
Computer vision syndrome
Retinal migraine
Glaucoma
Cat eye syndrome
Cataract