Green Star: Diagnostics & Examinations
How do you determine a Green Star? What kind of examinations are necessary for the ophthalmologist? More about diagnostics in this chapter.
For the measurement of the intraocular pressure there are different procedures with different equipment. Normally, the measurement takes place from the outside. A distinction is made between examinations with or without touching the cornea. Only in individual cases and for research purposes, a probe is introduced into the anterior chamber of the eye.
Usually not. You first get painkilling eye drops, so you hardly feel the examination. Overall, the measurement of intraocular pressure (tonometry) is also not associated with a greater risk of complications. It is completely safe, however, depending on the procedure, again not.
In existing glaucoma and in the early detection of glaucoma, intraocular pressure plays an important role. However it is measured, one thing to keep in mind is that the intraocular pressure is not a constant variable but is subject to fluctuations in the course of the day.
Increased intraocular pressure is considered to be the major risk factor for the development of glaucoma (glaucoma) in addition to older age. The intraocular pressure is measured in mmHg. The upper limit of the normal range is 21 mmHg in ophthalmology.
The unit of measurement for intraocular pressure is millimeters of mercury (mmHg). For example, this unit measures blood pressure. A healthy intraocular pressure is usually between 10 and 21 mmHg. The standard value is about 15.5 mmHg. In children and adolescents 10 to 12 mmHg are normal.
No. Contrary to popular belief, elevated intraocular pressure is not part of the definition of glaucoma. Although there is an increased pressure in the eye in most forms of the green star and is therefore an important leading symptom. If one were to rely on it alone as a diagnostic criterion, almost half of those affected would remain unrecognized.
Only if you are healthy. If there are any factors or indications that increase your risk for glaucoma (glaucoma) or even justify a suspected glaucoma, the costs will be covered by the statutory health insurance. This usually also applies if you go well in the early detection examination and come out with the diagnosis of glaucoma or at least an increased intraocular pressure again.
For a rough orientation, the intraocular pressure can be measured with your fingers. To do this, the doctor carefully applies gentle pressure to the closed eye with both forefingers while supporting himself with the other fingers on the forehead of the patient who is sitting opposite him. Experienced examiners should be able to sense the pressure of the eye down to about 2 mmHg.
To avoid erroneous measurements. Because an unusually thick or thin cornea of the eye falsifies the values of the glaucoma examination.
The CDR value is a criterion to assess the extent of glaucoma. The value can be determined by examining the fundus. This is about the so-called papilla.This is the place on the back eye through which the optic nerve comes out of the eye.
Perfusion pressure in medicine is the pressure with which a tissue to be treated is perfused. Its height results from the difference between the blood pressure in the afferent arteries and the opposing tissue pressure.
The measurement of the chamber angle is important in assessing whether a glaucoma or a glaucoma attack threatens. The chamber angle is an anatomical structure in the eye, through which the aqueous humor flows out of the eye. If this structure is too tight, there is a drainage obstruction and the intraocular pressure rises.
GDx laser polarimetry is a modern method for measuring the thickness of individual nerve fibers emanating from the optic nerve. It is used for the early detection of glaucoma (glaucoma) and for the follow-up of existing disease.