The pentacam is a new electronic device that can view the front of the eye with a camera without making contact with the eye. This device moves externally around the eye and measures the following clinical parameters:
The Pentacam allows the following clinical applications:
The pentacam is a rotating Scheimpflug camera system that makes images of the anterior segment of the eye. The Scheimpflug technique makes sharp and clear images that contain information from the anterior surface of the cornea to the posterior surface of the lens.
The great advantage of making these rotating images is that we can get extremely precise measurements of the central cornea, we can compensate for eye movements, it is easy for the patient to fixate on the point, and the recording time is extraordinarily short.
The pentacam calculates a three-dimensional model of the anterior segment and provides the following information:
The cornea is the foremost clear part of the eye. The structure of the eye looks like this:
Topography is an imaging technique that creates an image of the corneal surface (like a landscape map that includes hills, mountains, waves on the water and so forth). Tomography provides a representation of the cornea by creating a cross section of the anterior part of the eye. The form of the cornea is measure precisely during the measuring with a corneal topogragh. The device measures the curvature of the cornea at more than 2000 points. You will not feel anything during this examination.
With the assistance of the Pentacam, a corneal tomography makes a cross section of the different layers of the cornea. In this way it is possible to collect much more information about the refractive power of the cornea. The refractive power of the front and back surface of the cornea can be measured at each spot on the cornea. Additionally, there are various calculations possible that reveal whether the cornea is normal or abnormal.