Camera Image; Refractive Compare - OCULUS Easygraph 70620 Instruction Manual

The camera image of the measurement is displayed
in original size.
The ring edges determined during image processing
can be sketched in (and deleted again afterward)
with the [Rings] button. This permits exact control of
the image processing as well as a specific evaluation
of the reflection of the Placido system.
The [Pupil / Iris] button additionally enables you to
mark the edge of the iris and pupil in order to check
the measurement of the cornea diameter.
The comparative representation serves to depict
changes in corneal refractivity such as can be caused
by wearing Ortho-K lenses (or through refractive
surgery).
Map 1 on the top right gives a refractive
representation of the current measurement (see
Chapter 7.2.2.7). You have the option of loading a
second refractive measurement in map 2 below.
Instruction Manual Easygraph

7.5.2.9 Camera Image

The magnifying function serves to enlarge details.
This is done by clicking in the image with the left
mouse button, whereupon the area around the
mouse pointer appears enlarged in the bottom right-
hand corner of the display.
Use the right mouse button to deactivate the
magnifying function.

7.5.2.10 Refractive Compare

When this second measurement has been loaded the
refractive difference between the two is automatically
calculated and shown in the large map on the left.
This map is generated by subtracting the second
map from the first. Thus the patient´s change in
refractivity is shown.
Underneath the refractive difference map is a
diagram showing a section through the refractive
difference.
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