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5-11
Patient Preparation
the internal lens into position (you may hear a click while this occurs) and dim the
illumination to avoid pupillary constriction by default.
The patient's exam experience with the CIRRUS HD-OCT is normally brief and comfortable.
An experienced operator can acquire several scans from each eye in the space of 5–7
minutes. An exam usually requires the patient to look inside the imaging aperture for 1–3
minutes at a time for each eye, depending on the number of scans desired. The instrument
acquires most scans in 1–5 seconds. The additional time is required to align the patient
before scanning and to optimize scan quality. The patient may sit back between scans as
needed. Note that the CIRRUS HD-OCT is never to contact the patient's eye.
Selecting a scan type moves the chinrest into the default or saved position for the scan.
Wait until the chinrest automatic positioning is complete before instructing the research
subject to place his or her chin on the chinrest.
If you are using a prior scan (see
Patient Preparation
on page 5-10) on a patient, the
patient must wait until the prior scan has been selected and the chinrest motions are
complete before placing their head in the chinrest. Reducing the amount of time the
patient spends in the chinrest improves patient comfort.
Optional Eyelid Elevation
To get a scan unobstructed by the eyelids, especially for vertical scans, you may find it
necessary to tape the eyelids of either eye or manually elevate the eyelid during scan
acquisition in accordance with standard medical practice. For many patients, it is sufficient
to ask them to open their eyes wide during scan acquisition. In certain cases however, it
may be necessary to tape the patient's eyelids in order to get an unobstructed scan.
Precautions
CAUTION: When you complete scan acquisition and before you click the Finish or ID
Patient button in the A
screen, always prompt the patient to sit back and move the
CQUIRE
head away from the chinrest. Clicking either of these buttons in the A
screen causes
CQUIRE
the chinrest to reposition itself beyond the point where the patient's face would contact
the lens if the head remained in the chinrest. Failure to observe this warning could result in
injury to the patient.
screen, have patient sit back before you click Finish or ID Patient.
In the A
CQUIRE
CIRRUS HD-OCT User Manual
2660021169012 Rev. A 2017-12
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Table of Contents
Troubleshooting
