CR-2 Plus AF
See the smallest details, don’t miss pathology
Canon was the very first company to introduce a Non Myd Retinal Camera as far back as 1976 The CR-2 AF was built on that legacy, it is equipped with superb Canon optics and Canon’s own EOS digital camera technology, with its renowned image processing capabilities, has been adapted exclusively for Canon retinal cameras to offer optimal retinal imaging, for the highest image quality.
In addition the unique Canon Opacity Suppression feature largely suppresses the effects of cataracts and other ocular opacities.
Color
FAF
Low flash photography
In addition to the photometric Auto Exposure, the CR-2 Plus AF offers low flash photography. This reduces patients’ discomfort greatly, It improves workflow since images of both eyes can be taken without hindered by pupil restriction. Ideal for photophobic patients.
Fixation Lamp shifting presets
The CR-2 Plus AF offers the possibility to preset 4 fixation lamps patterns for the internal fixation. Each pattern has a maximum of 9 positions. Suitable to be used with various screening protocols.
45 degrees
CR-2 Plus AF provides Non Mydriatic images at a 45 degrees angle (67.5 degrees when using center of eye ball as reference).
Angle of incidence vs central angle of view
Fundus Autofluorescence (FAF)
A diagnostic technique for documenting the deposition of lipofuscin in the retinal pigment epithelium (RPE). It is easy and non invasive and provides information that may otherwise not be clinically detectable.
It can be a valuable asset in diagnosing retinal disease.
Since the introduction of fluorescein angiography (FFA) in 1959, ophthalmologists observed that even without the use of fluorescein, parts of the fundus would show areas of faint fluorescence under certain conditions. This naturally occurring fluorescence is mainly caused by Lipofuscin. Lipofuscin is a fluorescent pigment that accumulates in the RPE as a metabolic byproduct of cell function.
Lipofuscin deposition normally increases with age, but may also occur from RPE cell dysfunction or an abnormal metabolic load on the RPE. FAF imaging can visualize the deposition of lipofuscin in the retinal pigment epithelium (RPE). Areas of excess Lipofuscin accumulation will appear hyperfluorescent. But when RPE cells die or are absent, LF disappears, leading to hypofluorescence.
Am I missing something without FAF?
In this example it is clear that the FAF image is showing additional clinical information that can’t be seen in the color image!
Green Spectrum
The Canon CR-2 Plus AF utilizes green light spectrum to stimulate the retina and captures the emission in the yellow-orange spectrum- utilizing carefully selected matching optical filters. Using the green spectrum may provide more detail in the fovea, as where blue light tends to be absorbed by the high concentration of macular pigments. Additional advantage of green light is that the longer wavelength tends to have less absorption by the crystalline lens of the eye, especially in patients with cataracts.
CLINICAL FAF images
Normal distribution of lipofuscin
Retinal pigment epithelial atrophy
Digital Redfree and cobalt image
Without having the requirement to take an additional image, the RX software can create a digital red free or cobalt image from the color image. It is based on the Canon EOS retina technology and proprietary image processing - using the original RAW image of the digital camera.
The image quality is fully comparable with images obtained with optical filters.
Digital Redfree
Digital Cobalt
Stereo guide marks
Stereo Photography
The CR-2 Plus AF is suitable for stereo photography as well, by taking two retinal images sequentially to form a stereo pair. The capture sequence is simple with easy stereo guides that are shown on the observation monitor. Or create a stereo set manually and create a pair in the RX software.
Stereo Pair
Stereo viewing
A standard commercial optical stereo viewer can be used for reviewing. The individual images of the stereo pair can be aligned easily in the RX software to obtain maximum stereo effect.
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