A Gonio test, also known as gonioscopy, is a noninvasive eye examination used by eye care specialists, particularly ophthalmologists. The test's main purpose is to examine the drainage angle inside your eye, the area where fluid drains out to maintain healthy eye pressure.
Understanding Gonioscopy
Here's a breakdown of what the Gonio test entails:
- Purpose: To visualize the angle between the iris and cornea. This is crucial for understanding how fluid (aqueous humor) drains from the eye.
- Method: The test involves using special tools, such as a gonioscopy lens, which is placed on the eye after numbing drops are applied. This lens allows the specialist to see the internal structures of the eye that are not usually visible.
- Noninvasive: The test is considered noninvasive because it does not involve any surgical procedures or injections.
- Key Role in Glaucoma: According to the provided reference, it's vital for detecting and monitoring glaucoma. By examining the drainage angle, a specialist can determine if the angle is open, narrow, or closed.
Why is Gonioscopy Important?
Gonioscopy is an essential diagnostic procedure because it helps diagnose and manage several conditions, especially glaucoma, as per the reference.
- Glaucoma Diagnosis: The drainage angle's condition helps in classifying the type of glaucoma (open-angle or angle-closure).
- Monitoring: It is also used to monitor the progression of glaucoma and assess the effectiveness of treatment.
- Identifying other conditions: While most often used for glaucoma, it can also identify other underlying eye conditions affecting the drainage angle.
What to Expect During a Gonio Test
- Numbing Drops: Your eyes will be numbed with eye drops before the test to minimize discomfort.
- Lens Placement: A special lens will be gently placed on your eye.
- Examination: The ophthalmologist will use a special microscope (slit lamp) to look through the lens and examine the drainage angle.
- Duration: The test is typically quick, taking just a few minutes per eye.
- After the Test: You may experience temporary blurry vision and your vision should return to normal shortly after the test.
In Summary
| Feature | Description |
|---|---|
| Name | Gonioscopy |
| Purpose | To examine the drainage angle inside the eye |
| Method | Using a special lens placed on the eye |
| Key Use | Detecting and monitoring glaucoma |
| Noninvasive | No surgical procedure or injections involved |
