Phoropter
Phoropter
A Phoropter (pronounced: fuh-ROP-ter) is a medical instrument primarily used by optometrists and ophthalmologists during an eye examination to measure an individual's refractive error and determine their eyeglass prescriptions.
Etymology
The term "Phoropter" is derived from the Greek words "phoros" (meaning "carrier") and "opter" (meaning "vision"), indicating its function as a device that carries vision.
Function
A Phoropter is used to conduct a procedure known as a refraction test. This test allows the optometrist or ophthalmologist to determine the appropriate lens power needed to compensate for any refractive error (vision issues). The Phoropter achieves this by directing light into the eye, using different lenses to adjust the individual's vision until it reaches the clearest possible image.
Related Terms
- Optometry: The practice or profession of examining the eyes for visual defects and prescribing corrective lenses.
- Ophthalmology: The branch of medicine that deals with the diagnosis and treatment of disorders of the eye.
- Refractive error: A common eye disorder that causes blurred vision. It occurs when the eye cannot clearly focus the images from the outside world.
- Eyeglass prescription: A written order by an optometrist or ophthalmologist that specifies the value of all parameters the optician needs to create and fit corrective lenses appropriate for a patient.
See Also
External links
- Medical encyclopedia article on Phoropter
- Wikipedia's article - Phoropter
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