Which term refers to the measurement of pressure inside the eye?

The term that refers specifically to the measurement of pressure inside the eye is tonometry. This is a vital diagnostic tool that assesses intraocular pressure to help detect conditions like glaucoma. Tonometers, the instruments used in tonometry, measure the pressure exerted by the fluid inside the eye. Elevated eye pressure can lead to damage of the optic nerve and irreversible vision loss, making it essential for regular check-ups, especially for individuals at risk.

Ophthalmoscopy, while also related to eye examination, focuses on visualizing the interior structures of the eye rather than measuring pressure. Iritis refers to inflammation of the iris, which is a different ocular issue, and visual acuity pertains to the clarity or sharpness of vision. Therefore, tonometry is the most appropriate term that directly addresses the measurement of intraocular pressure.