What Is Vision Field Testing?
There are several types of vision field tests, each with its own advantages and limitations. The most commonly used tests include:
- Confrontation visual field testing: During this simple screening test the patient is asked to identify the location of a moving object in their field of vision. This test is useful in detecting gross visual field defects, but it is not as sensitive as other tests.
- Automated perimetry: This more precise and objective assessment involves the use of a computerized instrument that presents light stimuli at various locations in the visual field, while the patient responds by indicating when they perceive the stimulus. The results are plotted on a graph, and any abnormalities can be identified by comparing them to a normal visual field map.
- Kinetic perimetry: A small object is moved from the periphery of the visual field towards the center until the patient can detect it. The distance at which the object is detected is recorded and plotted on a graph. This test is particularly useful in detecting the extent of visual field loss in conditions such as glaucoma and retinitis pigmentosa.
- Static perimetry: Stationary light stimuli are presented at various locations in the visual field while the patient responds by indicating when they perceive the stimulus. The results are plotted on a graph, and any abnormalities can be identified by comparing them to a normal visual field map. This test is particularly useful in detecting subtle visual field defects.
- Frequency doubling technology (FDT) perimetry: This is a relatively new technology that uses a low spatial frequency stimulus to test the visual field. The test is particularly sensitive to the detection of early glaucoma damage and is often used as a screening tool in glaucoma clinics.
- Electroretinography (ERG): This test involves recording the electrical activity of the retina in response to light stimulation. It is particularly useful in detecting retinal disorders and is often used in conjunction with other vision field tests.
Why Do I Need Vision Field Testing?
Vision field testing is important because it helps to detect any abnormalities or defects in your visual field, which may be indicative of eye diseases such as glaucoma, macular degeneration, and optic nerve damage. These conditions can cause irreversible damage to your eyesight if left untreated. Vision field testing can also be useful in monitoring the progression of eye diseases and determining the effectiveness of treatment. Regular vision field testing is recommended for individuals at risk of eye disease, including those with a family history of eye conditions, high blood pressure, diabetes, or who are over the age of 40.
Vision Field Testing At Specs In The City
In summary, vision field testing is a vital tool in the assessment and management of various eye conditions. It helps to identify the location and extent of any visual field defects, which can be used to guide treatment and monitor disease progression. The choice of test used depends on the specific needs of the patient and the condition being tested. Patients should be aware of the importance of regular eye exams, including vision field testing, to ensure early detection and prompt management of any eye conditions.
Eye exams protect more than just your eye health and vision. Regular adult eye exams are a vital part of caring for your overall health and your optometrist can work with other health professionals, such as your family doctor, to ensure you get the treatment you need to stay healthy. To schedule an adult eye exam, contact the optometrists and staff at Specs In The City. Our team will make sure your vision is optimal and that any eye or general health conditions are diagnosed so that a personalized management plan can be created. To schedule an adult eye exam, call Specs In The City at 1-403-252-2020 or fill out the online contact form.
FAQ
Q: Is there anything I need to bring to an eye exam?
A: Once you’ve booked your appointment there are a few things you can bring to better help us ensure your eye care needs are met. They are:
- All prescription glasses, sunglasses, or contact lenses you’re currently using
- All eye drops you’re currently using
- The medications or supplements you’re currently on
- A detailed family history of serious medical conditions
- Details surrounding your vision insurance or work benefits
- Medical records surrounding any eye surgeries or injuries you’ve had
Q: Does Alberta Health cover eye exams?
A: The Alberta Health Care Insurance Plan (AHCIP) provides coverage for annual eye exams if you are between the ages of 0-18, or over 65. The provincial plan can also be used in times of emergency should you require an immediate appointment with an eye doctor. For those who are interested in booking an eye exam and who are between the ages of 19 and 64, Specs in the City is proud to offer affordable eye exams. Contact us to learn more.
Q: Who needs a vision field test?
A: Your optometrist will inform you that you should perform a visual field test during every eye exam (annual). However, if you come in with any health concerns, are older, or at risk (or have confirmed) glaucoma, your eye doctor may request more frequent testing. Suppose you are experiencing any vision loss or other health problems. In that case, your neurologist may also perform this test to diagnose possible causes and conditions. Vision field testing is usually recommended for patients experiencing tunnel vision symptoms such as abnormal pupils, difficulty seeing at night, light sensitivity, or even eye swelling and soreness.
