Keeler Ophthalmic Instruments Instructions

PLEASE READ AND FOLLOW THESE INSTRUCTIONS CAREFULLY

Ophthalmic and
Diagnostic Instruments

Instructions

Contents

1.0 Ophthalmoscopes

2.0 Retinoscopes

3.0 Otoscopes

4.0 Keeler Handles

5.0 Charging Instructions for Keeler Rechargeable Handles

6.0 Cleaning and Sterilization Instructions

7.0 Warranty & Service

8.0 Ophthalmic & Diagnostic Accessories

1.0 Ophthalmoscopes

Warning

This product must not be used in the presence of flammable gases.

Warning

This product should not be immersed in fluids.

Warning

Do not use if the product is damaged and periodically inspect visually for signs of

damage.

Warning

Federal law restricts this device to sale or order of a physician.

1.1 Specialist

1.2 Pocket

1.3 Standard

!

!

!

Graticule and
Filter Control

Lens Wheel

Pupilometer

Auxiliary
Lens Wheel

Lens

Wheel

Graticule and

Filter Control

Lens

Wheel

!

1.4 Practitioner / Professional

1.5 Lens Wheel

The lens wheel is rotated to select the required lens. Lens powers are displayed in the

viewing window as follows:

Black = (+) power lenses.

Red = (-) power lenses.

1.6 Auxiliary lens wheel

Swings in +/- 20 in one Dioptre step.*

*Professional only.

1.7 Specialist Auxiliary lens wheel

Rotate to align +10, +15, +30/ -10, -15, -30 Dioptre lenses.

1.8 Lens ranges

Specialist

+44D to –45D in single Dioptre steps.

Professional

+29D to –30D in single Dioptre steps.

Practitioner and Standard

+40D to –25D

Pocket

+20D to –20D

Auxiliary

Lens Wheel

Graticule
Control

Filter
Control

1.9 Graticule Control

The graticule control is used to select the required beam for examination. The choice of

graticules is as follows.

Wide Angle

Illuminates the largest area of fundus for the best possible general diagnosis

through a dilated pupil.

Intermediate

Permits easier access through an undilated pupil in peripheral examination.

Particularly useful in paediatric examination.

Macular

Designed specifically for viewing the macular area of the fundus. Reduces

pupillary reaction and improves patient comfort.

Slit

Used primarily to determine retinal elevations and depressions but may also be

used to assess anterior chamber depth.

Glaucoma

Projects a graticule onto the retina to assess the optic disc/cup ratio as an aid to

glaucoma diagnosis and monitoring.

Fixation Cross

Projects a graticule on to the retina for assessment of the degree and direction

of eccentric fixation. This is particularly useful when examining children.

The Graticule Range for each ophthalmoscope is as follows.

Specialist

Professional

Practitioner

Standard

Pocket

1.10 Filter Control *

The filter control is used to select the required filter.

(*Professional/Practitioner/Standard only.)

1.11 Filter Applications

Red Free (Green filter)

Is used to examine the blood vessels in fine detail. The green filter blocks red

rays showing blood vessels as black against a dark green background. This filter

is particularly useful for diabetic retinopathy.

Cobalt Blue *

Is used in conjunction with flourescein dye for the detection and examination of

corneal scars and abrasions.

(*Practitioner and Specialist only).

1.12 Pupillometer *

Hold the pupillometer adjacent to the patients eye to estimate pupil size. 1=1mm. The

range is 1mm to 8mm.

(*Applies to Specialist only.)

1.13 Precautions when using ophthalmoscopes

The intensity of light directed into the patients eye should be limited to the minimum

level necessary for diagnosis.

It is well established that exposure to the eye to intense light sources for extended

periods of time poses a risk of retinal photic injury. Many Ophthalmic instruments

illuminate the eye with intense light. The decision about the intensity of light level used

in any procedure must be made on a case by case basis. In each case, the clinician must

take a risk benefit judgement about the intensity of light to be used. Use of insufficient

intensity may result in inadequate visualization and in adverse effects more serious than

a retinal photic injury. Further, despite all efforts taken to minimize the risk of retinal

damage, damage may still occur. Retinal photic injury is a possible complication of the

need to use bright light to clearly visualize ocular structures during delicate ophthalmic

surgical procedures.

While no visible retinal photic lesions have been identified for ophthalmic instruments, it

is recommended that illumination levels be set to the minimum level necessary to perform

the diagnostic function. Young children and persons with diseased eyes may be at higher

risk. The risk may also be increased if the person being examined has had any exposure

with the same instrument or any other ophthalmic instrument using an intense visible

light source during the previous 24 hours. This will apply particularly if the eye has been

exposed to retinal photography.

The time to reach a potential optical radiation hazard for this device is 3 minutes when

the instrument is being operated at maximum intensity and maximum aperture. This

time is for a cumulative exposure in a day. It should be noted that there is a safety factor