Psoriasis in a systemic disease that effects many systems of the body. few studies examined the hearing function of these patients but the results were inconclusive. No study, however, investigated the vestibular function of psoriatic patients.

In a prospective study, the investigators will compare audiovestibular function between psoriatic patients and healthy volunteers. .

Whether psoriatic patients have higher risk for developing inner ear dysfunction (hearing loss and dizziness) is an important issue that needs to be elucidated. Awareness to the elevated risk (if there is any) of inner ear impairment, early detection and treatment of the condition may reduce the morbidities resulting from undiagnosed audiovestibular impairment.

In a prospective study the investigators will examine the inner ear function (vestibular and auditory) of psoriatic patients and compare it to an healthy, young control group.

The study will include 2 groups of participants: psoriatic patients and healthy volunteers. psoriatic patients are recruited from the dermatology clinic while the healthy volunteers are members of the hospital staff.

The participants will undergo 2 sets of examinations:

1. auditory function examination: hearing test (that includes pure tone audiometry, speech audiometry and discrimination level), tympanometry and otoacoustic emissions.

2. vestibular function examination:

   • Video head impulse test: a ten-minute, non- invasive test that includes a computer and a set of goggles worn by the participant. The participants is sitting in front of a wall while wearing the goggles, the investigator moves the participant's head sideways with short, rapid movements. the computer calculates the accuracy and the velocity of the eyes movements.
   • The participants fills a dizziness handicap inventory questionnaire. The participants from the psoriatic group are recruited from the dermatology clinic. The healthy group participants are members of the hospital staff and are recruited from the hospital.

Inclusion Criteria:

• Psoriatic patients that are treated in our institute.

Exclusion Criteria:

• Patients suffering from cardiovascular diseases (peripheral vascular disease,congestive heart failure, status post cerebrovascular accident).
• Conditions that are harmful to the inner ear (chronic renal failure,history of noise exposure, usage of ototoxic drugs, chronic otitis media, ear surgery in the past, significant head trauma in the past, ear drum perforation).
• participant that complains of vertigo/ dizziness/ unsteadiness.
• Participant who is/ was suffering from known inner ear disease: meniere disease, acoustic neurinoma, vestibular neuronitis.

The individual participant data will be collected in the principal investigator computer for a period of 7 years.

The computer has a personal password and the computer if located inside a locked room.