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.

How is the intraocular pressure measured?

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.

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Is measuring intraocular pressure painful or dangerous?

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.

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What should be considered when measuring intraocular pressure?

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.

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What does the intraocular pressure say?

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.

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What are normal values ​​for intraocular pressure?

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.

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Is the intraocular pressure always higher for the Green Star?

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.

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Glaucoma: Do I have to pay for the screening myself?

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.

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How to measure the intraocular pressure with your fingers?

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.

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Glaucoma examination: Why is corneal thickness so important?

To avoid erroneous measurements. Because an unusually thick or thin cornea of ​​the eye falsifies the values ​​of the glaucoma examination.

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What is the value of CDR in glaucoma?

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.

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What is the perfusion pressure?

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.

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Glaucoma examination: Which width of the chamber angle is normal?

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.

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Glaucoma: What is GDx Laser Polarimetry?

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.

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