User's Manual Part 5

6.8

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Operation

Operation of the Doctor Protection Filter

• Before operating the slit lamp, the

Doctor Protection Filter cable must be plugged in and

ﬁ rmly attached to the rear panel of the

PurePoint

™

laser system.

™

laser system.

™

• The Doctor Protection Filter is operated by moving the lever from the unprotected

position to the ﬁ lter protected (engaged) position. The 532nm laser treatment beam is not

operational until the ﬁ lter lever is in the engaged position.

• When using beam splitter accessories, the binoculars must ﬁ rst be attached to the

beam

splitter (the beam splitter accessories are attached to the beam splitter on the protected

side of the Doctor Protection Filter assembly); the beam splitter is then attached to the

permanently installed Doctor Protection Filter (see Figure 6-9).

Positioning and

Focusing the Laser Beam

1. Move the joystick left and right to horizontally position the laser spot and illumination

slits.

2. Rotate the joystick to vertically position the laser spot.

3. Move the joystick forward and backward to focus the laser spot.

Adjusting the

Laser Position and Spot Size

Following customary methods, position patient and place the contact lens on patient's eye.

2. Using the joystick control on instrument base, bring the selected area of treatment into

position/focus. If desired, lock instrument base in position with instrument base slide

set knob.

3. To position the laser spot, choose one or a combination of the following methods:

3.1 Using the joystick control, position the laser spot on the selected treatment area.

3.2 Using the micromanipulator, position the laser spot around the microscope center

ﬁ eld of view.

3.3 Tilt the contact lens.

4. Use the laser spot size adjustment lever to set the laser spot size.

Laser Treatment of the Eye

1. The Doctor Protection Filter must be connected and in working order. To protect the

user's eyes, the ﬁ lter must be in the engaged position prior to ﬁ ring the treatment laser.

2. For laser spot sizes ranging from 50 µm to 500 µm, the focus is parfocal; i.e., the focus

of the laser spot lies in the focal plane of the microscope (see Figure 6-11). For laser

spots greater than 500 µm, the laser spot sizes are set by defocusing the laser; i.e., the

laser focus will not lie in the focal plane of the microscope).