What can a visual field test detect?

The test is performed by an ophthalmologist and is used to detect areas of vision loss (blind spots) caused by a brain tumor, stroke, glaucoma, diabetes, hypertension, or head trauma. It can also be used to monitor the progression of previously known visual field loss.

What is a visual field test for eyes?

A visual field test measures how far the eye sees in any direction without moving and how sensitive the vision is in different parts of the visual field. This helps doctors to find certain types of injuries and disease, like glaucoma.

How do you do a visual field test?

The test requires the patient to look into a machine, hold their head still, and detect a series of flashing lights without moving their eyes. The patient is instructed to tap a button whenever a flash of light is detected. The light flashes vary in intensity and appear in all quadrants of the visual field.

What is the name of the diagnostic tool used to detect intraocular pressure?

Tonometry measures the pressure within your eye. During tonometry, eye drops are used to numb the eye. Then a doctor or technician uses a device called a tonometer to measure the inner pressure of the eye. A small amount of pressure is applied to the eye by a tiny device or by a warm puff of air.

How accurate is a visual field test?

Results: Overall, patients performed reliably in 52\% of visual field tests. The most common cause of poor reliability was fixation loss, with 43\% of patient tests deemed unreliable due to a fixation loss rate greater than 20\%.

How can I check my peripheral vision at home?

You can test your peripheral vision with the help of someone else using similar techniques to those used by an eye doctor. Cover one eye at a time while focusing on something directly in front of you. Have a helper hold up fingers in your peripheral vision to see if you can tell them how many they are holding up.

How is IOP measured?

In most ophthalmologist’s offices, eye pressure is measured using “Goldmann applanation tonometry,” and this is considered a “gold standard” eye pressure measurement. In this test, the eyes are anesthetized with numbing drops. Then, a small tip gently touches the surface of the eye and the eye pressure is measured.

What does a tonometer measure?

A tonometry test measures the pressure inside your eye, which is called intraocular pressure (IOP). This test is used to check for glaucoma, an eye disease that can cause blindness by damaging the nerve in the back of the eye (optic nerve).