Understanding Aberrometers: How They Measure Refractive Error and Astigmatism

Aberrometer is a device used to measure the refractive error of the eye, particularly the amount of astigmatism present. It is used in optometry and ophthalmology to determine the correct prescription for glasses or contact lenses.

The aberrometer measures the way light is focused by the eye by shining a beam of light into the eye and measuring the deviation of the light as it exits the eye. This information is then used to calculate the refractive error of the eye, including the amount of astigmatism present.

Aberrometers are typically used in conjunction with other tests, such as retinoscopy and autorefraction, to obtain a more complete picture of the eye's refractive error. They are commonly used in routine eye exams to ensure that patients have the correct prescription for their glasses or contact lenses.