Perimetry instruments

References:
MonCv1, MonCv3, MonPack3

• The cupola stimulator is entirely compatible with the modern static perimetry and the Goldmann standards. It includes a projection system with a mirror controlled by microstepping motors.
• It is suitable for high resolution static and kinetic perimetry over the entire visual field and binocular exams realization.

• MonCv3 is a multifunction perimeter.
  It is designed for the evaluation of the central visual field (60 degrees) and peripheral field along the horizontal meridian (130 degrees).
• In addition to "classical' visual field examinations, it allows tests with chromatic contrast (blue / yellow perimetry) and with motion stimuli (motion perimetry).
• Several other functional tests are availab le as options: visual acuity (ETDRS), contrast sensitivity, glare, pupillometry, ...

• MonPack3 is a universal device allowing to realize psychophysical and electrophysiological tests.

Conventional perimetry

These conventional procedures use of a grid of regularly spaced testing points. All tests are performed with Goldmann size III and a background luminance of 10 cd/m2.

F.A.S.T. perimetry

The F.A.ST. perimetry (Fiber Adapted Static Testing) relies on an optimized arrangement of testing points corresponding to the most frequent alterations of the retina and optic nerve fibers.

Tests for drivers and low vision

Blue / Yellow perimetry (option)

These procedures use a blue color, Goldmann size V stimulus which is generated over a high luminance (100 cd/m2) yellow background.

Motion perimetry (option)

Motion perimetry is a new approach of perimetry exams based on motion stimulations. It presents several advantages:

• motion stimulation has increased sensitivity for the detection of deficits of the magno cellular system (early stage of glaucoma, ...)
• motion stimulation is less sensitive than classic perimetry to optical factors such as refractive errors and diffusion by lens or cornea opacities.

Real time follow-up

The program provides interactive controls of the examination which improve significantly the quality of the results. At the beginning of each exam, a warning message will be displayed if the first results are outside of the normal range, allowing the operator to correct a possible problem such as incorrect refractive correction or patient's misunderstanding of the instructions. Throughout the exam, the operator can follow the progress of the examination thanks to a real time graphic representation of the results.

Fixation monitoring

The high resolution video camera allows an accurate control of fixation by the operator. As an option, Metrovision proposes an automated fixation control which uses the image of the eye to automatically measure in real time the eye movements and pupil size and reject the responses in case of movement or eye blink.

Quantitative analysis and global indexes

A map of deficits is obtained by subtracting measures performed on the patient from normal, age-matched values. The estimated global (or diffuse) loss is subtracted from these deficit values to determine the map of corrected deficits (or local deficits).
Maps of probabilities of deficits and corrected deficits are also determined from a statistical analysis taking into account the depth, the density and the location of the deficits.
Finally, global indexes are evaluated, including the mean of deficits (with respect to the normal limit taking in account the age) and the mean of corrected deficits (obtained from the previous one by subtracting global or diffuse loss).

Follow-up analysis

The automated follow-up program generates a list of all perimetry exams performed on the same eye of the same patient.
It calculates a graph showing the evolution of the global indexes over time (mean deficit and corrected mean deficit).
It also displays a map showing the rate of evolution of the different locations of the field: in green color, the areas which are improving in sensitivity and in red color the areas which are deteriorating.

Neurological analysis

This analysis allows the comparison between the average deficits found in both eyes in quadrants and hemifields:

• comparison of average deficits per quadrants,
• comparison of right and left hemi fields,
• comparison of upper and lower hemi fields.

Fundus perimetry

The fundus program allows the comparison of the visual field with the eye fundus. The image of the eye fundus is imported as an image file either through the computer network or by USB key, CDROM etc. The operator identifies by a simple click the position of the fovea and papilla and the program automatically performs the scaling and repositioning the eye fundus image.

Computer interface

• standard Windows XP or VISTA operating system
• back-up of data on CD, DVD or computer server
• direct access to results through computer network
• easy exportation of data to other applications as images or pdf files

Recommended options:

• set of large field refractive lenses
  (reference HVM-OPTI)
• blue/yellow perimetry
  (reference PVM-CV-blue-yellow)
• motion perimetry
  (reference PVM-CV-motion)
• automatic control of fixation and pupilla measurement
  (reference PVM-CF)
• electric table
  (reference HVM-table)

Compatible stimulators:

	MonCv3	MonPack3	MonCv1
White over white static perimetry
Blue over yellow perimetry
Motion perimetry
Kinetic perimetry	.	.
Mixed perimetry	.	.

For additional information, refer to the specific brochures of these stimulators.