How do you measure AC depth?

The simplest method of assessing ACD is by shining a pen torch into the patient’s eye from the temporal canthus such that the pen torch lies in the same plane as the eye. In the case of a deep anterior chamber, the iris lies flat and the whole iris will be illuminated.

What is AC depth in eye?

The depth of the anterior chamber of the eye varies between 1.5 and 4.0 mm, averaging 3.0 mm. It tends to become shallower at older age and in eyes with hypermetropia (far sightedness). As depth decreases below 2.5 mm, the risk for angle closure glaucoma increases.

What is the purpose of Van herick technique?

Slit-lamp estimation of the peripheral anterior chamber depth (ACD) by the Van Herick technique is a noncontact approach for estimating angle width and various authors have commented on its sensitivity and specificity as a screening tool for identifying narrow angles as well as angle closure.

How is anterior chamber depth measured?

Main Outcome Measures Anterior chamber depth was measured by optical pachymetry, slitlamp-mounted A-mode ultrasound, and handheld ultrasound. Gonioscopy was used to detect occludable angles, defined as one in which the trabecular meshwork was visible for less than 90° of angle circumference.

What is AC in ophthalmology?

AAG – Acute angle closure glaucoma. AC – Anterior chamber. ACC – Accommodative. ACG – Angle closure glaucoma.

What is shallow AC?

The part of your eye between your iris (the coloured part of your eye) and your cornea (front of your eye) is a liquid filled space called the anterior chamber.

What is normal van herick angle?

The method involves a narrow slit of light from a slit lamp being projected onto the peripheral cornea at an angle of 60⁰ as near as possible to the limbus.

How do you measure anterior chamber depth?

Why is anterior chamber deep in myopia?

However, the usual cause of the excessively deep anterior chamber in these eyes is a reverse pupillary block. The iris and anterior lens capsule form a tight seal that prevents infusion fluid from equalizing with the posterior chamber.