Riester ri-scope L Instrucciones Para El Uso página 51

7.1. Purpose/indication
The Riester ophthalmoscope described in these instructions for use is produced
for examination of the eye and fundus.
CAUTION!
Because prolonged intense exposure to light can damage the retina, the use of
the eye exam device should not be unnecessarily prolonged, and the brightness
setting should not be set higher than needed for a clear representation of the
target structures.
The irradiation dose of the photochemical exposure to the retina is the product
of irradiance and duration of irradiation. If the irradiance is reduced by half, the
irradiation time may be twice as long to reach the maximum limit.
Although no acute optical radiation hazards have been identified for direct or
indirect ophthalmoscopes, it is recommended that the intensity of light directed
into the patient's eye be reduced to the minimum required for examination/dia-
gnosis. Infants / children, aphasics and people with eye diseases are at higher
risk. The risk may be increased if the patient has already been examined with
this or another ophthalmological instrument during the last 24 hours. This is
especially true when the eye has been exposed to retinal photography.
The light of this instrument may be harmful. The risk of eye damage increa-
ses with the duration of irradiation. An irradiation period with this instrument
at maximum intensity of longer than >5 min. exceeds the guideline value for
hazards.
This instrument does not pose a photobiological hazard according to DIN EN
62471 but still features a safety shutdown after 2/3 minutes.
7.2. Lens wheel with correction lenses
The correction lenses can be adjusted using the lens wheel. The following cor-
rection lenses are available:
Ophthalmoscope L1 and L2
Plus: 1-10, 12, 15, 20, 40 Minus: 1-10, 15, 20, 25, 30, 35.
Ophthalmoscope L3
Plus: 1-45 in single steps
Minus: 1-44 in single steps
The values can be read off in the illuminated field of view. Plus values are indi-
cated by green numbers, minus values by red numbers.
7.3. Apertures
The following apertures can be selected using the aperture setting wheel:
Ophthalmoscope L1
Semi-circle, small/medium/large circular aperture, fixation star, slit.
Ophthalmoscope L2
Semi-circle, small/medium/large circular aperture, fixation star and slit.
Ophthalmoscope L3
Semi-circle, small/medium/large circular aperture, fixation star, slit and grid.
Aperture
Semi-circle:
Small circle:
Medium circle:
Large circle:
Grid:
Slit:
Fixation star:
7.4 Filters
The following filters can be applied to each aperture using the filter wheel:
Ophthalmoscope L1 red-free filter
Ophthalmoscope L2 red-free filter, blue filter and polarisation filter.
Ophthalmoscope L3 red-free filter, blue filter and polarisation filter.
Function
for examination of cloudy lenses
for reflex reduction in small pupils
for reflex reduction in small pupils
for normal fundus examinations
for topographical assessment of retinal changes
to determine differences in level
for determination of central or eccentric fixation
51