Confrontation tests to assess the extent of the field of view in the eye
confrontation to assess the extent of the field of view in the eye. How do we determine the value of a confrontation test? Do you guess or have to use Campimeter? If I don't have a measuring instrument, is there another way? Thank you
ANSWER
A confrontation test is one of the tests carried out in an eye examination with the aim of knowing whether the patient's field of view is normal. The field of view is the entire area that can be seen by the eye, which consists of a central view in the middle, and a peripheral view that is a visible part even though we do not move the eyeball, even though it is not focused like the center view.
Some diseases that can reduce peripheral vision are glaucoma. People with glaucoma usually do not realize their peripheral vision decreases and often complain of tripping or bumping into something while walking.
The way to do a confrontation test is as follows. Patients and examiners sit face to face at a distance of about 60 cm, then the patient and examiner close their eyes with the same hand or another cover. So suppose the patient closes his right eye, because the examiner sits face to face, so the examiner closes the examiner's left eye. This test is carried out with the examiner using a specific focal point, either in the form of a finger or pen, then stretching the hand that does not close the eye and pulling it into or nearing the body for several times. First with the position above, one in the middle and below. An examination can be done more often to get more accurate results. Then continue with the other eyes.
Regarding your question, there is no need to use a campimeter or visual field tool to do this test, you can guess it. But for other purposes such as determining the progress or progress of recovery or comparing the severity, campimetry may be needed to get the right level of comparison. Our advice consults your question with an ophthalmologist to avoid misunderstanding. So, hopefully useful.