Visual field defects occur when a person’s ability to see their surroundings does not meet normal standards, caused by glaucoma, macular disease, or an aneurysm. Defects can be diagnosed through basic or specialized testing methods.
Unless a person is blind, they should be able to see a certain amount of their surroundings. There are standards regarding this ability that are considered normal. Such standards are referred to as field of view or field of view. When a person’s ability to see their surroundings does not meet the standards, they may be diagnosed with a visual field defect. This condition could be caused by glaucoma, macular disease, or an aneurysm.
To understand what a visual field defect is, it can help to think of vision as it is seen through binoculars. The two circular areas that are shown can be considered the field of view. A person’s field of vision should include the ability to see a certain amount vertically and horizontally. A field vision defect could, in this case, be diagnosed if part of the visual field is blocked.
Defect, in this sense, means a capability that is partly defective. Blindness is not considered a defect in field vision. This is because blindness tends to result in complete incapacity. It is possible for a person to have a visual field defect without realizing it. This can cause the person to have accidents that can be seen as clumsy mistakes.
The causes of a visual field defect can vary widely. Often, there are certain causes associated with the various types of defects. For example, a peripheral visual field defect could be caused by glaucoma or retinal detachment. If there is a central field defect, this could be caused by macular holes or cone dystrophies. Lesions, which can occur anywhere in a person’s visual path, are a common cause of a variety of such defects.
If a person seeks medical help for such a condition, they are likely to be asked to provide some information. The ophthalmologist will probably want to know when and how the problem arose. Patients are also usually asked to describe what they are experiencing. This can include the degree or way objects look warped and whether the problem occurs in both eyes.
There are several methods to check if a person has a visual field defect. Direct comparison refers to basic testing methods that involve introducing objects such as fingers or a light into a person’s field of vision and having them provide feedback on what they see. There are more specialized tests, however, such as electroretinography. This test method uses electrodes to evaluate activity in the retinas.
Protect your devices with Threat Protection by NordVPN
