Visual campimetry is performed with the patient seated and with his face glued to the measuring device, called a campimeter, which emits points of light in different places and with different intensities in the patient's field of vision.
During the test, a light at the bottom of the device is emitted so that the patient keeps the vision focused on it. Thus, he will have to activate a bell in his hand as he is able to identify the new points of light that appear, but without moving his eyes to the sides, finding the lights only with peripheral vision.
Care during the exam
Patients who wear contact lenses do not need to remove them for the exam, but they must always remember to bring the latest prescription prescription for the glasses.
In addition, patients who are undergoing treatment for glaucoma and use the drug Pilocarpine should speak to the doctor and ask for authorization to suspend the use of the drug 3 days before conducting the campimetry test.
Types of Campimetry
There are two types of exam, manual and computerized campimetry, and the main difference between them is that the manual is made from the commands of a trained professional, while the computerized test is all controlled by the electronic device.
In general, Manuel campimetry is indicated to identify problems in the more peripheral vision and to evaluate patients with great loss of visual acuity, the elderly, children or debilitated people, who have difficulty following the commands of the device.
What is it for
Campimetry is an exam that assesses vision problems and areas without vision in the visual field, indicating whether there is blindness in any region of the eye, even if the patient does not notice the problem.
Thus, it is used to make the diagnosis and monitor the evolution of problems such as:
- Glaucoma; Retinal diseases; Optic nerve problems, such as papilledema and papillitis; Neurological problems, such as stroke and tumors; Eye pain; Drug intoxication.
In addition, this exam also analyzes the size of the visual field captured by the patient, helping to detect peripheral vision problems, which are the sides of the field of view.
To learn how to identify vision problems, see:
