Hearing management

Ear disorders


Presbycusis is the loss of hearing due to ageing.

Waardenburg syndrome

Waardenburg syndrome (WS) is an inherited disorder that causes varying degrees of hearing loss and color changes in the skin, hair, and eyes. People with WS typically have pale white skin. Some people may have patches of white hair, while others may experience premature graying of the hair when they are as young as 12 years old. The eyes may be a very pale blue, or they may each be a different color (usually brown and blue). Sometimes, one eye may be two different colors.

Wernicke-Korsakoff syndrome

Wernicke-Korsakoff syndrome, sometimes called cerebral beriberi, is a severe memory disorder usually associated with chronic excessive alcohol consumption, although the direct cause is a deficiency in thiamin (vitamin B1). It may also result from dietary deficiencies, prolonged vomiting, eating disorders, or the effects of chemotherapy medications.


Otosclerosis refers to abnormal bone growth in the middle ear, leading to hearing loss.

Treacher Collins syndrome (TCS)

Treacher Collins syndrome (TCS), also called mandibulofacial dysostosis and Franceschetti-Zwalen-Klein syndrome, is a rare genetic disorder that causes abnormal development of facial bones and tissues, resulting in a wide range of facial defects. Symptoms vary from barely noticeable to severe. In general, most people have underdeveloped facial bones, especially cheekbones.

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Hearing Expert

Heidi Allan is a qualified audiologist and speech-language therapist with 28 years experience both in South Africa and the Netherlands. I am a member of the American Academy of Audiology, the American Speech-Language Hearing Association, the South African Speech-Language Hearing Association and the South African Audiology Association. I have held leadership roles at both provincial and national level in my profession and deliver presentations across the country on aspects of audiology. My areas of particular interest include Central Auditory Processing Disorders (CAPD), hearing aid fitting and rehabilitation, diagnostic audiology and public education.

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