Instruments
for visual electrophysiology

References:
MonPack3, MonColor, MonBaby

• is a universal and compact stimulator combining all the necessary characteristics to the realization of flash and pattern VEP ERG exams and sensory EOG complying with international standards
• It includes a near infra red camera
• It includes a near infra red camera for monitoring eye fixation and electrodes
• It allows the realization ofcan multifocal and psychophysic exams such as visual field, contrast sensitivity, glare test and much more

• is a "ganzfeld" stimulator for flash ERG and flash VEP exams and sensory EOG
• It can be coupled with a pattern stimulator for VEP and pattern ERG stimulations exams
• It includes a near infra red camera
• Theversion allows the realization of standard ISCEV protocol (white flashes) and red and blue stimulaitons with programmable intensity and duration.
• The "plus" version allows a wide range of research protocols such as: - very high intensity flashes (up to 100 times the ISCEV standard flash) for the study of A waves saturation, - blue flashes over a yellow background for the study of S cones, - long duration flashes for the study of "on" and "off" responses.

This stimulator is designed specifically for the ERG and VEP exams of young infants and patients confined to bed. It is made of a matrix of light emitting diodes with computer programmed light intensity and stimulation frequency (to 30 Hz). It is proposed with white, red and blue sources.

Stimulators MonPack3 and MonColor are equipped in standard with a near infra red video camera for exams performed at 1 m.

For the examinations performed at longer distances such as pattern VEP, the MonPack3 universal stimulator can be equipped with an additional near infra red monitoring camera (option reference HVM-camera) which is very useful for the examination of young children and of malingering patients.

• The amplifiers are incorporated in a case placed near the patient and include 2, 4, 6 or 8 recording channels with an optoelectronic isolation.
• The high input impedance and common mode rejection ratio insure unequalled performances.

Programs for VEP
and ERG with flash and
pattern stimulation

Reference: PVM-EL

• Automated control of the impedance of electrodes
• Simultaneous recording of up to 8 channels
• Automated rejection of artifacts (eye blinks, patient's movements)

Complete realization of the International Society for Clinical Electrophysiology of Vision protocol (ISCEV)

• rod response with low intensity stimulation under dark adaptation
• mixed response (rods and cones)
• cone response with standard flash stimulation and with flicker stimulation (30 Hz) under light adaptation
• automated analysis of amplitudes and implicit times, frequency analysis, analysis of oscillatory potentials
• Additional stimulations: blue scotopic and red photopic.

• Reliable results are obtained thanks to the optimization of stimulation parameters, to the use of electrodes that do not degrade the quality of the retinal image of the stimulation and to an efficient algorithms for the rejection of artefacts.

Sensory EOG exams

PVM-ES

VEP and ERG multifocal exams

PVM-MU

Fast evaluation of visual acuity with sweep VEP

PVM-SS

Use of VEP for the evaluation of binocular vision

PVM-ST

• The equipment and program provided by Metrovision are compatible with the different electrodes commercially available.
• For VEP exams: cupola and needle electrodes. For ERG exams: corneal or non corneal electrodes.
• A large set of electrodes is proposed in the catalogue of electrodes supplied by Metrovision.

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