RAPD
RAPD
RAPD (pronunciation: /ræpd/), also known as Relative Afferent Pupillary Defect, is a medical term used in ophthalmology to describe an abnormal reaction of the pupils of the eyes when exposed to light. The term RAPD is an acronym derived from the initial letters of the words in the phrase "Relative Afferent Pupillary Defect".
Etymology
The term RAPD is a modern medical acronym. The word "relative" comes from the Latin "relativus", meaning "having reference or relation to something". "Afferent" is derived from the Latin "afferens", the present participle of "affere" which means "to bring to". "Pupillary" is derived from the Latin "pupilla", which means "little doll", and by extension, the "pupil of the eye". "Defect" comes from the Latin "defectus", meaning "lack" or "failure".
Definition
In the context of ophthalmology, RAPD is a condition where the pupils of the eyes respond abnormally to direct and consensual light reflex. This is often indicative of a number of potential underlying conditions, such as optic neuritis, retinal detachment, or severe retinal infection.
Related Terms
- Anisocoria: A condition characterized by an unequal size of the eyes' pupils.
- Marcus Gunn pupil: Another name for RAPD.
- Optic neuropathy: Damage to the optic nerve that can cause RAPD.
- Swinging flashlight test: A clinical test used to detect RAPD.
External links
- Medical encyclopedia article on RAPD
- Wikipedia's article - RAPD
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