SIRIUS

TOMOGRAPH AND CORNEAL TOPOGRAPHER

Combines placido disk topography with Sheimpflug tomography of the anterior segment. Sirius provides information on pachymetry, elevation, curvature and dioptric power of both corneal surfaces over a diameter of 12 mm. All biometric measurements of the anterior chamber are calculated using 25 sections from the cornea. Measurement speed reduces the effect of eye movement producing a high quality accurate measurement.

In additi on to the clinical diagnosis of the anterior segment the most common uses are: refractive and cataract surgery, an IOL calculati on module is available. Objective examinations provide an accurate measurement of pupil diameter in scotopic, mesopic and photopic conditions. when combined with the corneal map they can be used for refractive surgery planning and follow-up.

 

KERATOCONOUS SCREENING

Keratoconous screening provides the clinician with important information about the patinets cornea. Understanding this can help prevent complications associated with ectasia before corneal surgery is undertaken.  

GLAUCOMA SCREENING

For glaucoma specialists Sirius enables the measurement of irido-corneal angles and pachymetry. These two values are useful in the diagnosis of the disease.  

PUPILLOGRAPHY

Sirius has built-in pupillography measurement software. The measurement of the pupil in scotopic (0.04 lux), mesopic (4 lux), photopic (50 lux) conditions and in dynamic mode. Knowing the center and the diameter of the pupil, is essential for many clinical procedures which seek to optimize vision  quality.  

CORNEAL ABERROMETRY

Aberrometric analysis offers a complete overview of the corneal aberrations. It is possible to select the contribution of the anterior, posterior or total cornea for different pupil diameters. The OPD/WFE maps and the visual simulations (PSF, MTF, image convolution with optotype) can help the clinician  in understanding or explaining the patient’s visual problems.  

ADVANCED ANALYSIS OF THE tear FILM

Placido disk technology allows for the advanced analysis of the tear film, such as NIBUT (Non Invasive Break-up Time).  Based on the Ocular Surface Disease Index questionnaire (OSDI), limbal and conjunctival hyperaemia, Meibomian glands analysis, tear meniscus analysis  and tear osmolarity, calculated merging together all partial scores, provides an owerall evaluation of the clinical condition of the patient for a comprehesive diagnosis of the dry eye disease.  

INTRASTROMAL RINGS

On the basis of the pachymetry map and corneal alti- metric data, SIRIUS allows for intrastromal rings system planning, which maybe an option for the correction of refractive defects and some forms of keratoconus.  

TECHNICAL DATA

Data transfer Firewire
Power supply external power source 24 VCC In: 100-240Vac - 50/60Hz - 0.9-05A - Out: 24Vdc - 40W
Power net cable IEC C14 plug
Dimensions (HxDxW) 515 x 315 x 255mm
Weight 7Kg
Chin rest movement 70mm ± 1mm
Minimum height of the chin cup from table 24cm
Base movement (xyz) 105 x 110 x 30mm
Working distance 74mm
   
LIGHT SOURCES  
Placido disk Led @635nm
Scheimpflug Led @475nm UV-free
Pupillography Led @875nm
   
TOPOGRAPHY  
Placido disk rings 22
Measured points 21632 (front surface) 16000 (rear surface)
Topographic covering 12mm
Dioptric measurement range 1D to 100D
Measurement accuracy Class A according to the UNI EN ISO 19980-2012
Compatibility with standard DICOM v3 (IHE integration profile EYECARE Workflow)
   
MINIMUM SYSTEM REQUIREMENT  
PC: 4 GB RAM - Scheda Video 1 GB RAM (non condivisa) risoluzione 1024 x 768 pixels - USB 3.0 type A Sistema operati vo: Windows XP, Windows 7 e Windows 10 (32/64 bit).