The Pilcz reflex is a medical term used to describe a reflexive movement of the eye in response to heat stimulation of the skin of the forehead. The word is spelled as [ˈpilʧ reflex], with the first syllable rhyming with "pill" and the second syllable pronounced as "ch". The letter "c" is followed by an "h" to depict the voiceless palato-alveolar affricate sound. This reflex is named after its discoverer, László Pilcz, a Hungarian ophthalmologist who first described it in 1966.
Pilcz reflex is a neurological phenomenon characterized by an involuntary reflex movement of the lower eyelid. This reflex occurs in response to a variety of stimuli, such as intense light, strong wind, or a sudden loud noise. It is believed to be a protective mechanism of the eye, aiming to shield it from potential harm or irritation caused by these external factors.
The Pilcz reflex is named after the Polish ophthalmologist Dr. Józef Pilcz, who first described and studied this reflex in the early 20th century. According to his research, the reflex is mediated through the cranial nerves associated with the eye muscles, particularly the oculomotor nerve, which controls the movement of the eyelids.
The reflex manifests as a quick, involuntary closure of the lower eyelid, often accompanied by a slight upwards movement of the upper eyelid. These movements occur reflexively and involuntarily, without conscious control or effort.
While the Pilcz reflex is commonly observed in individuals, its intensity and frequency can vary from person to person. Some individuals may exhibit a stronger reflex response, while others may experience a milder or barely noticeable reflex movement.
Overall, the Pilcz reflex plays a crucial role in safeguarding the eyes from potential harm caused by external stimuli. By quickly closing the lower eyelid, it helps protect the delicate structures of the eye and minimize the risk of injury or irritation.
Change in the size of the pupils when one's attention is suddenly attracted to some object.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.