Essilor CORNEA 550, User Manual

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• A wide range of synthetic descriptors of corneal characteristics such as:
◦ Sim-K to simulate fixed ophthalmoscope measurements (for the anterior surface)
◦ Main corneal meridians in 3 mm, 5 mm and 7 mm areas
◦ The flattest and steepest hemi meridians in 3 mm, 5 mm and 7 mm areas
◦ Peripheral degrees
◦ Pupil decentralization, pupillary radius and size of the corneal diameter
◦ Keratorefractive indices calculated in the pupil area to evaluate patient's visual quality
◦ Keratoconus screening index for diagnosis and follow-up
Pupillometry module
A pupillometry module completely integrated with topography enables:
• Pupillometry with scotopic light to determine pupil maximum extension and optic zone diameters for
treatment settings
• Pupillometry with mesopic light (4 lux)
• Pupillometry with photopic light (50 lux)
• Dynamic pupillometry, starting with over 400 lux and switching off the light source so that the pupil
can dilate to its maximum extension
• Evaluation of pupil decentralization from the corneal vertex for each of the conditions previously
described and calculation of the pupil centre during dilation
• Apply the measurements previously listed to the calculation of the corneal wavefront and visualize the
pupil in different conditions on the topographic map
Videokeratoscopy module
• Examination of the tear film with white light
• Examination of the tear film with fluorescein
• Break up time measurement
• Examination of tear layers
• Examination of rigid contact lens' adaptation with fluorescein
a. Classification
Medical device classification
Device classification in accordance with the rules set out in Annex IX of Directive 93/42/EC and subsequent
amendments: Class I with measuring function.
This device is 0459 since march 2015. Its expected lifetime is 7 years.
Electromedical devices classification
• Type of protection against direct and indirect contact: Class I
• The only applied part is the headrest
• Applied parts: Type B.
• Degree of protection against humidity: common device (no protection against water seepage) IP20.
• Sterilization method: disinfectable device.
• Degree of protection when used with anaesthetics or flammable detergents: no protection.
• Conditions of use: continuous operation.
• Degree of electrical connection between the device and the patient: device with parts applied to the
patient.
U
SER MANUAL
> I. I
NTRODUCTION
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Cornea550 - Corneal Topographer > V4 - 12-2017