Neitz IO-A LED, Руководство пользователя

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(3) Rotate the Filter Selection Lever to choose between the 3 available filters below:
Marker Filter Use
White UV Normal use. Filter will not alter the color tone
Green Red-free
Blood will appear dark, facilitating recognition of blood
vessels or hemorrhages.
Blue Cobalt Blue Used in conjunction with fluorescein
The color of the Battery Lamp will change according to the amount of battery power
remaining. The Battery Lamp will turn orange to indicate that there is less than 20 minutes
remaining (at maximum illumination level).
Color Condition of Battery Pack and Necessary Actions
Green Battery operational. Continue use
Orange Little battery power remaining. Charge immediately
Unlit Battery fully discharged. Charge immediately
3.2.5 Examination
WARNING
Do not illuminate the patient’s eye for more than 1 minute per eye and be sure
to keep illumination at minimal intensity needed to view the fundus.
(1) Holding an aspherical lens in one hand, direct the illumination into the patient eye. It
is recommended to place the unoccupied fingers of the hand holding the aspherical
lens on the patient’s face for stability.
(2) Bring the aspherical lens close to the patient eye and gradually move away from the
eye until a clear image of the fundus is obtained.
*Note: The distance between the patient eye and aspherical lens is dependent on
the optical power (diopter, 1 D = 1 / focal distance in meters) of the aspherical
lens.
Optical Power Description of Image
14 D to 16 D High magnification, bright image, narrow field of view
20 D Typically used in standard examinations
28 D to 30 D Low magnification, dim image, wide field of view
The illumination system and observation system can be configurated as follows to
optimize examination
<Examining Large Pupils>
When examining the fundus through large pupils,
raise both the Illumination Angle Adjustment Lever
and Observation Angle Adjustment Lever. The
illumination axis and observation axes are
distanced, allowing for better stereoscopic vision
with reduced glare (see Fig. 3.9a).
Illumination
Light
Observation
Light
Fig. 3.9a