What is an ophthalmometer?
ophthalmometer, also known as a keratometer, is a medical tool commonly used to measure corneal curvature during the eye test. The cornea is a clear front of the eye, covering the iris and the pupil and the measurement can be used to diagnose the presence and degree of astigmatism, which is a problem of vision, which is usually caused by a wrong cornea. This tool is also used to install contact lenses and monitor the corneal changes due to wearing contact lenses. Ophthalmometers can also be used during eye surgery to allow precise cuts in the cornea. The eye test using an ophthalmometer is usually performed in an optometrist or ophthalmologist, the procedure is non -invasive and requires no part of the tool to touch the eye.
The word ophmmometer comes from the Greek word for the eye, ophtalmos. The "Science of Eyes" ophthalmology deals with anatomy, physiology and eye diseases, such as astigmatism. Jakotigmatism is usually caused by an irregular or erroneous cornea. This defect causes a refractor error, toIt makes it difficult to see fine details and provides blurred vision. Rarely, astigmatism is due to the fact that the lens around the cornea is wrong.
Ophthalmometer is commonly used to diagnose astigmatism and to determine what corrective regulation is necessary for its treatment. During the eye test, the eye specialist looks at the eye with the instrument, while the pupil shines light and gets the necessary measurements. These corneal measurements are called keratometric values and are used to determine the necessary treatment. Depending on the type of astigmatism, vision can be used to restore glasses or contact lenses.
Ophthalmometer was invented by German physiologist Hermann von Helmholtz in 1880, and although the modern version of this tool uses optical sensors and computer technology, its basic design is still quite similar. To obtain accurate measurement of corneal curvature, the eye center reflects the light formula of images called mirres on the eyeEye missile. Then the size and formula of this reflection in the area of the cornea is measured. This reflection is compared with the actual size and pattern of images on the ophthalmometer. Knowledge of the distance between the actual images on the instrument and their reflection in the cornea can be determined by the curvature of the cornea by means of a mathematical formula.