gonioscopy

Thân thiện

An ophthalmologist performs a gonioscopy on a patient's eye.

Definition

Noun: A diagnostic medical procedure that involves the visual examination of the anterior chamber angle of the eye, specifically the area where the iris meets the cornea. This examination is a critical tool for assessing the eye's drainage system and is primarily used to differentiate between the two main types of glaucoma: open-angle glaucoma and closed-angle glaucoma.

Usage

Gonioscopy is a standard procedure in ophthalmology. It is performed using a specialized optical instrument called a goniolens or gonioprism, which is placed on the patient's eye. This lens, often coupled with a slit lamp microscope, allows the clinician to directly view the iridocorneal angle, which is otherwise hidden from normal observation.

Examples

• The ophthalmologist performed a gonioscopy to evaluate the patient's risk for angle-closure glaucoma.
• Regular gonioscopy is recommended for patients with ocular hypertension to monitor the drainage angle.
• The results of the gonioscopy confirmed the diagnosis of open-angle glaucoma.

Advanced Usage

• Dynamic Gonioscopy: A technique where pressure is applied to the goniolens during the examination to manipulate the anterior chamber angle, providing additional information about its structure and potential for closure.
• Indentation Gonioscopy: A specific type of dynamic gonioscopy used to assess the reversibility of angle closure.

Variants and Related Words

• Goniolens (n): The specialized contact lens used to perform gonioscopy.
• Gonioprism (n): A type of goniolens that uses a prism to provide the view of the angle.
• Goniophotography (n): The photographic documentation of the anterior chamber angle.
• Gonioscopic (adj): Pertaining to or performed by gonioscopy. (e.g., ).

Synonyms

• Angle examination
• Anterior chamber angle assessment

Related Phrases and Terms

• Iridocorneal angle: The anatomical structure examined during gonioscopy.
• Trabecular meshwork: The eye's primary drainage system, located within the angle and visualized during gonioscopy.
• Shaffer grading system: A common method used during gonioscopy to classify the width and appearance of the anterior chamber angle.

Học thuật

Noun

1. an examination of the front part of the eye to check the angle where the iris meets the cornea; it is used to distinguish between open-angle glaucoma and closed-angle glaucoma