HVF 24-2 This is ordered for 90% of glaucoma patients. This is your baseline exam that all glaucoma suspects and glaucoma patients need at routine intervals. HVF 10-2 This is ordered for the 10% of glaucoma patients who are so advanced that the HVF 24-2 is mostly black, with only a central island of remaining vision.
What is HVF 24 2 glaucoma?
HVF 24-2 This is ordered for 90% of glaucoma patients. This is your baseline exam that all glaucoma suspects and glaucoma patients need at routine intervals. HVF 10-2
What is the difference between a 24-2 and a 30-2 HVF?
In most cases, the 24-2 testing strategy provides information comparable to that provided by the 30-2 strategy in a shorter time and with less variability. A 30-2 HVF may be warranted in patients under observation for evolving idiopathic intracranial hypertension.
What is HVF 10 2 used for?
HVF 10-2 This is ordered for the 10% of glaucoma patients who are so advanced that the HVF 24-2 is mostly black, with only a central island of remaining vision. Macular diseases including plaquenil toxicity exams also need 10-2. HVF 30-2
What can an HVF tell you about a patient?
It has a wider angle and can capture peripheral field defects. Name, demographics, etc: Make sure you are looking at the right patient! Fixation loss: The HVF will routinely flash dots in the patient’s physiological blind spot to check if the patient has his / her gaze fixated on the center.
What is Hvf 24-2 eye test?
HVF 24-2. This is ordered for 90% of glaucoma patients. This is your baseline exam that all glaucoma suspects and glaucoma patients need at routine intervals.
How do you interpret a 24-2 Humphrey visual field printout?
A value of 40 dB or higher on this graph indicates that the patient may be "trigger happy." That is, the patient is anticipating the presentation of the stimulus and is responding before the stimulus is seen. Readings of 40 dB or higher indicate an unreliable field that will need to be repeated.
What is Hvf eye test?
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. Appointments 216.444.2020. Request an Appointment.
What is a normal visual field test result?
A normal visual field is an island of vision measuring 90 degrees temporally to central Fixation, 50 degrees superiorly and nasally, and 60 degrees inferiorly. Visual acuity increases from movement discrimination in the extreme peripheral vision to better than 20/20 in the center of vision.
What do the numbers mean on a visual field test?
The visual threshold is the intensity of stimulus seen 50% of the time at each location. The threshold values of each tested point are listed in decibels in the sensitivity plot. Higher numbers mean the patient was able to see a more attenuated light, and thus has more sensitive vision at that location.
What happens if you fail a visual field test?
For example, it can range from a nearly complete loss of peripheral vision to a small area of partial loss. People with visual field loss may have trouble seeing objects out of the corner(s) of their eyes, lose their place while reading, startle when people or objects move toward them, or bump into people and objects.
Do you wear glasses for visual field test?
Yes, patients can wear their normal glasses, contacts or a trial frame if needed during visiual field testing on a Matrix 800. It is okay to use bi-focal or progressive lenses.
What foods to avoid if you have glaucoma?
A diet with a lot of saturated fats will lead to weight gain and an increase in body mass index. This can not only increase intraocular pressure, but also cholesterol levels. That means limit fatty beef, lamb, pork, butter, cheese, milk, and other dairy products.
How long does visual field test take?
The test, which measures the central and side vision for each eye, takes approximately 5-10 minutes, and you can blink normally throughout. During the test, one eye is covered (so that one eye is tested at a time), and you want to always look straight ahead at the steady yellow light.
How long does a eye test take?
In the majority of cases, an eye test will take at least 20 to 30 minutes. Your vision is precious and getting regular check-ups with your optometrist will help to protect and preserve it by helping to monitor your overall eye health.
How is a visual field test performed?
Your doctor uses it to make a complete image of your field of vision. They cover one eye with a patch as you look into a tool called a perimeter. You press a button when you see a light blink. This test can tell your doctor about which lights and what level of dimness you can or can't see.
What does OCT scan stand for?
An optical coherence tomography scan (commonly referred to as an OCT scan) helps us to view the health of your eyes in greater detail, by allowing us to see what's going on beneath the surface of the eye.
How to tell if a field defect is worsening?
As a very, very general guideline, you can look at the density / size of the field defect, the pattern standard deviation, and the mean deviation (MD) to see if it is worsening. However, your decision should also take into account the normal variability between each visual field, the optic nerve head appearance, pressures, patient compliance, OCT, visual symptoms, etc.
What is fixation loss?
Fixation loss: The HVF will routinely flash dots in the patient’s physiological blind spot to check if the patient has his / her gaze fixated on the center. If the patient can actually see the spot, then it’s recorded as a fixation loss. Reliable tests have below 20% fixation loss (although many people have their own opinions about these upper limits).
What is a false positive test?
False positive: The user pressed the button when there was no stimulus. They were “trigger happy”. Reliable tests have below 33% false positives.
What is a 24-2 test?
24-2: Measures 24 degrees temporally and 30 degrees nasally and tests 54 points. Used for neuro-ophthalmic conditions and general screening as well as early detection of glaucoma
What is a hemifield test?
The glaucoma hemifield test (GHT) provides assessment of the visual field where glaucomatous damage is often seen. It compares five corresponding and mirrored areas in the superior and inferior visual fields. The result of either 'Outside Normal Limits' (significant difference in superior and inferior fields), 'Borderline' (suspicious differences) or 'Within Normal Limits' (no differences) is only considered when the patient has, or is a suspect for, glaucoma. This is only available in 30-2 and 24-2 analyser protocol.
What is a Humphrey field analyzer?
Humphrey field analyser ( HFA) is a tool for measuring the human visual field that is commonly used by optometrists, orthoptists and ophthalmologists, particularly for detecting monocular visual field.
What is the visual field index?
The visual field index (VFI) reflects retinal ganglion cell loss and function, as a percentage, with central points weighted more.
What is the numerical display of sensitivity?
The numerical display represents raw values of patient's retinal sensitivity at specific retinal points in dB. Higher numbers equate to higher retinal sensitivities. Sensitivity is greatest in the central field and decreases towards the periphery. Normal values are approximately 30 dB while recorded values of <0 dB equate to no sensitivity measured.
What is shaded pattern of vision loss?
The shaded pattern of vision loss provided on the pattern deviation plot allows for diagnosis of the type of vision loss present. This contributes to other clinical findings in the diagnosis of certain conditions. The types of vision loss and associated conditions are not described in the extent of this article, however Figure 5 provides typical examples of visual field loss seen. Refer to #See also for more information.
