OPHTHALMOMETER Meaning and
Definition
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An ophthalmometer, also known as a keratometer or a corneal measuring instrument, is a specialized optical device used to measure the curvature or radius of the cornea. The cornea, being the transparent front surface of the eye, plays a crucial role in focusing incoming light onto the retina. The accuracy of this focusing mechanism relies on the cornea's shape and curvature, which can be assessed through ophthalmometry.
The ophthalmometer consists of several components, typically including a light source, a series of mirrored surfaces, and a viewing apparatus. To measure corneal curvature, the patient is asked to fixate on a target, while the ophthalmometer projects light onto the cornea. The reflection of this light is observed and measured, providing data on the curvature of the cornea at specific meridians.
Ophthalmometry is an invaluable tool in optometry and ophthalmology practices. It aids in diagnosing and monitoring conditions like astigmatism, which occur when the cornea has an irregular shape, resulting in distorted vision. By accurately assessing corneal curvature, ophthalmometers enable practitioners to prescribe appropriate corrective lenses or contact lenses, ensuring optimal visual acuity for patients.
Overall, the ophthalmometer is an essential instrument in the realm of eye care, facilitating precise measurements of corneal curvature and contributing to accurate diagnosis and treatment of visual disorders.
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1. An instrument for determining the amount and direction of corneal and lenticular astigmatism through observation of the distorted images reflected from the cornea and lens. 2. An instrument for determining the distance of distinct vision.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for OPHTHALMOMETER
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Etymology of OPHTHALMOMETER
The word ophthalmometer has Greek origins. It is derived from the Greek words ophthalmos, meaning eye, and metron, meaning measure. Therefore, ophthalmometer literally means eye measure or instrument for measuring the eye.
Similar spelling word for OPHTHALMOMETER
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