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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.
Light spot patterns testing the central 24 degrees or 30 degrees of the visual field, are most commonly used. Most perimeters are also capable of testing up to 80 or 90 or even 120 degrees.
20 wrz 2024 · Among the most widely used VF tests are the 24-2 and 24-2C. The 24-2 exam is derived from the 30-2 protocol and evaluates the central 24 degrees of the retina with fixation centered on the fovea. It has become a standard tool for detecting defects that could indicate glaucoma or other neuro-ophthalmic conditions.
A 2019 study compared the three SITA speeds, analyzing results from 125 patients (51 percent female, mean age 67 years). Mean test times were 369.5 seconds for SITA Standard, 247 seconds for SITA Fast and 171.9 seconds for SITA Faster (p<0.001).1.
The first statement, "Central 24" indicates that the central 24 degrees of visual field were analyzed. The next number indicates how the grid of points is aligned to the visual axis. The number "1" indicates that the middle points are overlying the horizontal and vertical meridians.
10 mar 2022 · A visual field test can determine if you have blind spots (called scotoma) in your vision and where they are. A scotoma’s size and shape can show how eye disease or a brain disorder is affecting your vision.
Look at the pattern. Look at the GHT, mean deviation, VFI, and pattern standard deviation. Compare to the previous visual fields. The visual field test is among the most important tests to learn to interpret as you begin your career in ophthalmology. Learn about the top 5 most common fields!
