ABERROMETER | TOPOGRAPHER
The information provided by Osiris-T, a corneal topographer combined with a total ocular aberrometer, is indispensable for the correct evaluation of patients who have, in addition to traditional low-order defects, even more complex ocular aberrations, either corneal or internal.
Osiris-T has a unique pyramidal sensor design that allows the aberrometer to measure aberrations with a resolution of 45,000 points (at the maximum pupil diameter), with a wide dynamic range. It is also able to measure the ocular wavefront in real time with a frame rate of up to 33 images per second: this makes it possible to measure and view changes in power and aberrations while the patient is accomodating. Phoenix software offers a wide range of analysis options, such as refractive error maps and visual simulations (PSF, MTF and convolution with optotype), which helps the clinician to understand and explain the patient’s visual problems.
Using a reﬂection topography system based on a 22 ring Placido disk, Osiris-T is able to measure the morphology and the corneal refractive component by means of the sagittal curvature, tangential curvature, elevation and power maps. The availabilty of consolidated synthesis parameters makes the follow-up and diagnosis of keratoconus simple and intuitive. The integration of topographry and aberrometery enables the calculation of the internal component of the wavefront.
TORIC LENS ASSISTANTFor the evaluation of the performances of a toric system the combination of corneal topography imported from CSO topographers and ocular aberration makes it possible to distinguish whether any astigmatic residue is due to a rotation of the lens or to an incorrect calculation.
PUPILLOGRAPHYCompletely integrated with the topography of the ante- rior surface of the cornea, it performs the pupil measu- rement 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.
ANALYSIS SOFTWARE FOR ABERRATIONSThe tool integrates with the Phoenix software, offering a wide range of analysis options, such as refractive error maps and visual simulations (PSF, MTF and convolution with optotype), which helps the clinician to understand and explain the patient’s visual problems.
Ana B Plaza-Puche, Liberdade C Salerno Liberdade C Salerno
Singh, Neeraj K. BSOptom, MPhil1*; Jaskulski, Matt PhD1; Ramasubramanian, Viswanathan BSOptom, PhD1; Meyer, Dawn OD1; Reed, Olivia OD, MS1; Rickert, Martin E. PhD1; Bradley, Arthur PhD1; Kollbaum, Pete S. OD, PhD1
|Data transfer||USB 3.0|
|Power supply||external power source 24 VDC In: 100-240Vac - 50/60Hz - 2A - Out: 24Vdc - 100W|
|Power cable||IEC C14 plug|
|Dimensions (HxWxD||515 x 315 x 255mm|
|Chin rest movement||70mm ± 1mm|
|Minimum height of the chin cup from table||24cm|
|Base movement (xyz)||105 x 110 x 30mm|
|Pupillometry and auxiliary||Led @780nm|
|Points measured at maximum pupil||45000|
|Pupil size range||2-9mm|
|Dioptric range||sph from -25D to +15D; cyl up to 10D|
|Repeatability||0.05D on test eyes|
|Topographic covering (in 43D)||10mm|
|Dioptric measurement range||from 1D to 100D|
|Measurement accuracy||Class A according to 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).|