Which test measures intraocular pressure?

Which test measures intraocular pressure?

• A. Tonometry
• B. Ophthalmoscopy
• C. Slit-lamp examination
• D. Fluorescein staining

Answer: (A)

Measuring intraocular pressure involves assessing the fluid pressure inside the eye, which is important for glaucoma screening. Tonometry is the test that measures this pressure. It works by applying a small, controlled force to the cornea and determining how easily the cornea yields to that force or how much it must be flattened; from this resistance, the pressure inside the eye is calculated. There are several methods, including applanation tonometry (a standard approach that gently flattens the cornea), indentation tonometry, and non-contact tonometry (which uses an air puff). The other tests are used for different purposes: ophthalmology exams the retina and optic nerve, slit-lamp exams visualize the anterior structures of the eye, and fluorescein staining checks for corneal or conjunctival damage. So, tonometry is the test that measures intraocular pressure.

Measuring intraocular pressure involves assessing the fluid pressure inside the eye, which is important for glaucoma screening. Tonometry is the test that measures this pressure. It works by applying a small, controlled force to the cornea and determining how easily the cornea yields to that force or how much it must be flattened; from this resistance, the pressure inside the eye is calculated. There are several methods, including applanation tonometry (a standard approach that gently flattens the cornea), indentation tonometry, and non-contact tonometry (which uses an air puff). The other tests are used for different purposes: ophthalmology exams the retina and optic nerve, slit-lamp exams visualize the anterior structures of the eye, and fluorescein staining checks for corneal or conjunctival damage. So, tonometry is the test that measures intraocular pressure.