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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.
24-2: Measures 24 degrees temporally and 30 degrees nasally and tests 54 points. Used for neuro-ophthalmic conditions and general screening [5] as well as early detection of glaucoma [6] [7] 30-2: Measures 30 degrees temporally and nasally and tests 76 points.
Mean deviation (MD) is the average difference from normal expected value in the patients' particular age group. Typically, an MD of -2.00 or less could indicate glaucoma. PEARLS AND PITFALLS. Size target should typically be III unless the patient has very bad vision.
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.
The normal (monocular) human visual field extends to approximately 60 degrees nasally (toward the nose, or inward) from the vertical meridian in each eye, to 107 degrees temporally (away from the nose, or outwards) from the vertical meridian, and approximately 70 degrees above and 80 below the horizontal meridian.
25 sie 2023 · The location and the pattern of the points tested on the retina are decided by the different programs available on the machine. For example, 30-2, 24-2, 10-2, and the macular program are available on Humphrey Field Analyzer (HFA). The 30-2 tests the central 30 degrees field of the retina with fovea as fixation.
The normal field of vision extends to approximately 60° nasally, 90° temporally, 60° superiorly and 70° inferiorly. 3. The blind spot indicates the location of the optic nerve head—an area with no photoreceptors in the temporal part of. — the visual field.
