What is a common method used to measure intraocular pressure?

A tonometer is a common tool used to measure intraocular pressure (IOP), which is crucial for diagnosing and managing conditions like glaucoma. Elevated IOP can lead to optic nerve damage and vision loss, making accurate measurement essential. Tonometers can utilize various methods such as applanation, non-contact (air puff), or indentation techniques, allowing eye care professionals to assess the pressure within the eye effectively.

Other methods listed, such as refraction tests, pupil dilation, and ophthalmoscopy, serve different purposes in eye assessments; they do not provide direct measurement of IOP. Refraction tests determine the best corrective lens prescription, pupil dilation allows for internal examination of the eye, and ophthalmoscopy focuses on evaluating the retina and optic nerve. While these tests are vital components of a comprehensive eye exam, they are not designed to measure intraocular pressure.