What is the angle of the eye called?
What is the angle of the eye called?
Gonioscopy is performed during the eye exam to evaluate the internal drainage system of the eye, also referred to as the anterior chamber angle. The “angle” is where the cornea and the iris meet. This is the location where fluid inside the eye (aqueous humor) drains out of the eye and into the venous system.
What is the viewing angle of human eye?
The central field of vision for most people covers an angle of between 50° and 60°. Within this angle, both eyes observe an object simultaneously. This creates a central field of greater magnitude than that possible by each eye separately.
Where is anterior chamber angle?
The anterior chamber angle is a part of the eye located between the cornea and iris which contains the trabecular meshwork. The size of this angle is an important determinant of the rate aqueous humour flows out of the eye, and thus, the intraocular pressure.
What is vertical field of view?
It is defined as “the number of degrees of visual angle during stable fixation of the eyes”. The vertical range of the visual field in humans is around 150 degrees. The range of visual abilities is not uniform across the visual field, and by implication the FoV, and varies between species.
What is nearsightedness called?
Myopia. Commonly known as nearsightedness, myopia is the opposite of hyperopia. It is a condition in which an image of a distant object becomes focused in front the retina. This happens either because the eyeball axis is too long, or because the refractive power of the eye is too strong.
What is plateau iris configuration?
Plateau iris configuration refers to the situation in which the anterior chamber has a normal depth but the iris is plane. In this anatomical variation, the root of the iris is short and anteriorly inserted on the surface of the ciliary body.
What are the different Phorias and Tropias?
These are terms to describe when the eyes are not in alignment with each other. A tropia is always present, while phorias are there “some of the time,” such as when the patient is tired or when fusion is broken (you cover an eye and it starts to drift).
What’s the difference between phoria and Tropia?
A tropia is a misalignment of the two eyes when a patient is looking with both eyes uncovered. A phoria (or latent deviation) only appears when binocular viewing is broken and the two eyes are no longer looking at the same object.
