Keeler

More subtle definition of changes between acuity ranges specifically in amblyopic children

Ideal for testing acuity in children from 3 years of age.

3m working distance. 4 letters at each acuity level from 6/3 to 6/38

Laminated and washable.

A standard pocket set from Keeler with spare bulbs and specula.

The set consists of:

• 1x standard pocket otoscope.
• 1x pocket ophthalmoscope.
• 1x AA battery powered handle.
• 1x Hard carry case.
• 5x disposable speculae.
• 5x reusuable speculae.
• Spare bulbs
  
  

Pocket Otoscope

• Removable 2.5x magnifying lens allows the introduction of small instruments.
• Direct illumination with a regular bulb.
• Varied illumination with a smooth rheostat control.
• Insufflation port for manipulation of the tympanic membrane (bulb not included)
• Handle powered by 2 regular AA alkaline batteries.
• Comes complete with a spare bulb and bulb extractor.

Direct illumination
Bright light for basic examination of the ear

Removable lens
Allows easy access for smaller instruments.

Rheostat control
Smoothly control the power of illumination.

Insufflation port
For optional pneumatic otoscopy.

Pocket Ophthalmoscope

• 6 apertures:
  • Small - allows quick entry into small, undilated pupils.
  • Medium - provides excellent view of fundus through an undilated pupil.
  • Large - general examination of the eye through dilated pupil.
  • Red-Free Fixation Cross - cross-hairs for measuring eccentric fixation or locating lesions.
  • Slit - used to determine levels of lesions and tumors.
  • Red-Free - filters out red light for easy identification of veins, arteries and nerve fibers.
• 15 focusing lenses with a range of -20 to +20 diopters, adjustable via easy-to-reach maywheel.
• Renowned high performance Keeler optics with aspherical lens
• Comes complete with a spare bulb.

aperture selection disc
Switch easily between 6 apertures

Six Apertures
A wide range of practical apertures to select from.

Maywheel Focus
Easy access on either side of the head to adjust the diopters.

Replacement Bulb
Easy to replace the included bulb.

Rheostat Control
Smoothly control the power of illumination.

Laser Engraving

Medisave offer a free laser engraving service on the handle of this diagnostic set. Because we recognise the value and quality of your tools we have invested in the highest quality equipment and technicians to give you probably the finest engraving service available in the UK (superior to our competitor’s non-free efforts). The end result is an elegant, permanent, precision mark on the surface of the handle, allowing you to show a little of your personality and, more importantly, deterring thieves and making it easier to retrieve your property should you misplace it. The service does not delay your order and next day delivery services are available.

FREE SERVICE | HIGH QUALITY | NO DELAY | NEXT DAY DELIVERY

Hard Carry Case

• Deluxe hard case.
• Vacuum formed interior to keep instruments in place.
• Easy release safety catch.

More information: Using Ophthalmoscopes in Eye Examinations | Using Otoscopes in Ear Examinations

Pocket Ophthalmoscope

• 6 apertures:
  • Small - allows quick entry into small, undilated pupils.
  • Medium - provides excellent view of fundus through an undilated pupil.
  • Large - general examination of the eye through dilated pupil.
  • Red-Free Fixation Cross - cross-hairs for measuring eccentric fixation or locating lesions.
  • Slit - used to determine levels of lesions and tumors.
  • Red-Free - filters out red light for easy identification of veins, arteries and nerve fibers.
• 15 focusing lenses with a range of -20 to +20 diopters, adjustable via easy-to-reach maywheel.
• Renowned high performance Keeler optics with aspherical lens
• Comes complete with a spare bulb.

aperture selection disc
Switch easily between 6 apertures

Six Apertures
A wide range of practical apertures to select from.

Maywheel Focus
Easy access on either side of the head to adjust the diopters.

Replacement Bulb
Easy to replace the included bulb.

Rheostat Control
Smoothly control the power of illumination.

More information: Using Ophthalmoscopes in Eye Examinations

Medisave supplies health professionals, business and home users.

• Credit card, PayPal and Amazon Payments accepted
• Free delivery over £25 ex VAT
• NHS, school or company purchase order - email accounts@medisave.co.uk
• Laser engraving
• Delivery to private or commercial addresses
• Google Certified Shop
• Registered with the Medicines and Healthcare products Regulatory Agency (MHRA)
• ISO9001 quality management system + ISO 140001 environmental
• Established 1999

Need some advice? Speak to our friendly team on 0800 804 6447

Please note the engraving will be displayed as two lines of 30 characters.

• The new compact wall mounted design is ideal for ward, surgery, consulting room and casualty use.
• Strong coiled tangle-free cable permits instrument use up-to 3 metres from the transformer.
• The robust construction is ideally suited to the busiest working conditions.
• Automatic illumination when instruments are removed from cradle with LED confirmation.

Apertures, Graticules & Filters

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 and in peripheral examination. Particularly useful in paediatric examination.

Macular - Designed specifically for examination of the macular region of the fundus where a larger beam would create excessive pupilary reaction or discomfort.

Slit - Used primarily to determine retinal elevations and depressions but may also be used to assess anterior chamber depth.

Fixation Cross - Projects a graticule onto the retina for assessment of the degree and direction of eccentric fixation.

Red Free - The red free filter is used to examine blood vessels in fine detail. By filtering out the red light, blood vessels are silhouetted black against a dark green background.

Cobalt Blue - Used in conjunction with fluorescein dye for the detection and examination of corneal scars and abrasions.

More information: Using Ophthalmoscopes in Eye Examinations | Using Otoscopes in Ear Examinations

Please note the engraving will be displayed as two lines of 30 characters.

• The new compact modern design is ideal for ward, surgery, consulting room and casualty use.
• The robust construction is ideally suited to the busiest working conditions.
• Lithium-ion technology provides over 2 hours of continuous use and 2 hour rapid charge.
• LED's indicate when battery life is low, charging or fully charged.

Please note the engraving will be displayed as two lines of 30 characters.

• The new compact wall mounted design is ideal for ward, surgery, consulting room and casualty use.
• Strong coiled tangle-free cable permits instrument use up-to 3 metres from the transformer.
• The robust construction is ideally suited to the busiest working conditions.
• Automatic illumination when instruments are removed from cradle with LED confirmation.

Apertures, Graticules & Filters

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 and in peripheral examination. Particularly useful in paediatric examination.

Macular - Designed specifically for examination of the macular region of the fundus where a larger beam would create excessive pupilary reaction or discomfort.

Slit - Used primarily to determine retinal elevations and depressions but may also be used to assess anterior chamber depth.

Fixation Cross - Projects a graticule onto the retina for assessment of the degree and direction of eccentric fixation.

Red Free - The red free filter is used to examine blood vessels in fine detail. By filtering out the red light, blood vessels are silhouetted black against a dark green background.

Cobalt Blue - Used in conjunction with fluorescein dye for the detection and examination of corneal scars and abrasions.

More information: Using Ophthalmoscopes in Eye Examinations | Using Otoscopes in Ear Examinations

Please note the engraving will be displayed as two lines of 30 characters.

Practitioner Ophthalmoscope

• Postive action maywheel lens control allows you to select +40D to -25D
• 6 beams for full diagnostic capability
• Swing over red free filter
• Blue filter to be used in combination with Fluorescein for assessing corneal scratches

Practitioner Otosccope

• A popular otoscope that tends to be purchased by the GP or Primary Care Specialist.
• Unobstructed open style head for easy introduction of small instruments for wax or foreign body removal.
• Large slide aside 2.5x lens for clear view of aural structures and procedures under magnification.
• Facility to undertake pneumatic testing for tympanic mobility.
• Can be used with either permanent or disposable specula.

AA BATTERY HANDLE

• Rheostat easily allows light output to be tailored to application.
• Heads screw into place to keep secure during use.
• Powered by standard alkaline 'AA' batteries (not included).

Apertures, Graticules & Filters

• 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 and in peripheral examination. Particularly useful in paediatric examination.
• Macular - Designed specifically for examination of the macular region of the fundus where a larger beam would create excessive pupilary reaction or discomfort.
• Slit - Used primarily to determine retinal elevations and depressions but may also be used to assess anterior chamber depth.
• Fixation Cross - Projects a graticule onto the retina for assessment of the degree and direction of eccentric fixation.
• Red Free - The red free filter is used to examine blood vessels in fine detail.

More information: Using Ophthalmoscopes in Eye Examinations | Using Otoscopes in Ear Examinations

Keeler's top of the range battery powered diagnostic set ideally suited to the primary care professional.

The set consists of:

• 1x Premium fiber-optic otoscope.
• 1x Practitioner ophthalmoscope.
• 1x rheostat controlled battery powered handle.
• 1x Hard carry case.
• 5x Re-usable speculae.
• 5x Disposable speculae.
• 2 Replacement bulbs.
  
  

Premium Fibre Optic Otoscope

• Large slide aside 2.5x lens for clear view of aural structures and foreign body removal procedures under magnification.
• Fibre optics produce a ring of even light for an unobstructed, glare-free view.
• Insufflation port for manipulation of the tympanic membrane (bulb not included)
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Clear direct view
360° ring of FO light allows a completely unobstructed view.

Rheostat Control
Smoothly vary the power of illumination.

Large lens
For a clear view. Slides to one side for easy cleaning.

Insufflation port
For optional pneumatic otoscopy.

Replacement bulb
Easy to replace the included bulb.

Practitioner Ophthalmoscope

• 6 apertures:
  • Small - allows quick entry into small, undilated pupils.
  • Medium- provides excellent view of fundus through an undilated pupil.
  • Large - general examination of the eye through dilated pupil.
  • Fixation Star - graduated cross-hairs for measuring eccentric fixation or locating lesions.
  • Slit - used to determine levels of lesions and tumors.
  • Cobalt blue - used with flourescein dye to view small lesions, abrasions and foreign objects on the cornea.
• 1 filter can be used in conjunction with any of the above apertures:
  • Red-Free filter - filters out red light for easy identification of veins, arteries and nerve fibers.
• 28 focusing lenses with a range of -25 to +40 diopters, adjustable via easy-to-reach maywheel.
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Rheostat Control
Smoothly vary the power of illumination.

Aperture Selection Disc
Switch easily between 6 apertures.

Six Apertures
A wide range of practical apertures to select from.

Red-free filter
Slide the red free filter across any of the six apertures.

Dust cover
Protect the lens from dust when not in use.

Daisywheel Focus
Easy access on either side of the head to adjust the diopters.

Replacement bulb
Easy to replace the included bulb.

AA Battery Handle

• Rheostat easily allows light output to be tailored to application.
• Heads screw into place to keep secure during use.
• Powered by standard alkaline 'AA' batteries (not included).

Easy Attachment
Diagnostic heads simply screw into place.

Rheotronic Control
Smoothly control the applied power by turning the rheostat either clockwise or anti-clockwise.

Battery power
Powered by standard 'AA' alkaline batteries (not included).

Laser Engraving

Medisave offer a laser engraving service on the handle of this diagnostic set. Because we recognise the value and quality of your tools we have invested in the highest quality equipment and technicians to give you probably the finest engraving service available in the UK (superior to our competitor’s non-free efforts). The end result is an elegant, permanent, precision mark on the surface of the handle, allowing you to show a little of your personality and, more importantly, deterring thieves and making it easier to retrieve your property should you misplace it. The service does not delay your order and next day delivery services are available. NOTE: The engraving on this item is split over two lines of 30 characters each.

HIGH QUALITY | NO DELAY | NEXT DAY DELIVERY

Hard Carry Case

• Deluxe hard case.
• Vacuum formed interior to keep instruments in place.
• Easy release safety catch.

More information: Using Ophthalmoscopes in Eye Examinations | Using Otoscopes in Ear Examinations

Medisave recommends:

"This is our best selling Keeler AA battery powered diagnostic set. The set has Practitioner heads on both the otoscope and ophthalmascope, these are excellent quality and cover all the needs of general practice. Keeler are very well renowned in the ophthalmic industry and assemble all their products by hand at their base in Windsor. The set has a great quality feel to it and comes in a high quality rigid case with spare bulbs and speculae."

On clearance due to visual damage to the box and the handle being replaced by manufacturer. 

Keeler's top of the range battery powered diagnostic set ideally suited to the primary care professional.

The set consists of:

• 1x Premium fiber-optic otoscope.
• 1x Practitioner ophthalmoscope.
• 1x rheostat controlled battery powered handle.
• 1x Hard carry case.
• 5x Re-usable speculae.
• 5x Disposable speculae.
• 2 Replacement bulbs.
  
  

Premium Fibre Optic Otoscope

• Large slide aside 2.5x lens for clear view of aural structures and foreign body removal procedures under magnification.
• Fibre optics produce a ring of even light for an unobstructed, glare-free view.
• Insufflation port for manipulation of the tympanic membrane (bulb not included)
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Clear direct view
360° ring of FO light allows a completely unobstructed view.

Rheostat Control
Smoothly vary the power of illumination.

Large lens
For a clear view. Slides to one side for easy cleaning.

Insufflation port
For optional pneumatic otoscopy.

Replacement bulb
Easy to replace the included bulb.

Practitioner Ophthalmoscope

• 6 apertures:
  • Small - allows quick entry into small, undilated pupils.
  • Medium- provides excellent view of fundus through an undilated pupil.
  • Large - general examination of the eye through dilated pupil.
  • Fixation Star - graduated cross-hairs for measuring eccentric fixation or locating lesions.
  • Slit - used to determine levels of lesions and tumors.
  • Cobalt blue - used with flourescein dye to view small lesions, abrasions and foreign objects on the cornea.
• 1 filter can be used in conjunction with any of the above apertures:
  • Red-Free filter - filters out red light for easy identification of veins, arteries and nerve fibers.
• 28 focusing lenses with a range of -25 to +40 diopters, adjustable via easy-to-reach maywheel.
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Rheostat Control
Smoothly vary the power of illumination.

Aperture Selection Disc
Switch easily between 6 apertures.

Six Apertures
A wide range of practical apertures to select from.

Red-free filter
Slide the red free filter across any of the six apertures.

Dust cover
Protect the lens from dust when not in use.

Daisywheel Focus
Easy access on either side of the head to adjust the diopters.

Replacement bulb
Easy to replace the included bulb.

AA Battery Handle

• Rheostat easily allows light output to be tailored to application.
• Heads screw into place to keep secure during use.
• Powered by standard alkaline 'AA' batteries (not included).

Easy Attachment
Diagnostic heads simply screw into place.

Rheotronic Control
Smoothly control the applied power by turning the rheostat either clockwise or anti-clockwise.

Battery power
Powered by standard 'AA' alkaline batteries (not included).

Laser Engraving

Medisave offer a laser engraving service on the handle of this diagnostic set. Because we recognise the value and quality of your tools we have invested in the highest quality equipment and technicians to give you probably the finest engraving service available in the UK (superior to our competitor’s non-free efforts). The end result is an elegant, permanent, precision mark on the surface of the handle, allowing you to show a little of your personality and, more importantly, deterring thieves and making it easier to retrieve your property should you misplace it. The service does not delay your order and next day delivery services are available. NOTE: The engraving on this item is split over two lines of 30 characters each.

HIGH QUALITY | NO DELAY | NEXT DAY DELIVERY

Hard Carry Case

• Deluxe hard case.
• Vacuum formed interior to keep instruments in place.
• Easy release safety catch.

More information: Using Ophthalmoscopes in Eye Examinations | Using Otoscopes in Ear Examinations

Medisave recommends:

"This is our best selling Keeler AA battery powered diagnostic set. The set has Practitioner heads on both the otoscope and ophthalmascope, these are excellent quality and cover all the needs of general practice. Keeler are very well renowned in the ophthalmic industry and assemble all their products by hand at their base in Windsor. The set has a great quality feel to it and comes in a high quality rigid case with spare bulbs and speculae. The RRP of this unit is in excess of £308 + Vat! "

Keeler's NEW top of the range battery powered diagnostic set ideally suited to the primary care professional.

The set consists of:

• 1x Premium fiber-optic Halogen otoscope.
• 1x Practitioner LED ophthalmoscope.
• 1x rheostat controlled battery powered handle.
• 1x Hard carry case.
• 5x Re-usable speculae.
• 5x Disposable speculae.
• 1 Replacement bulbs.

Premium Halogen Fibre Optic Otoscope

• Large slide aside 2.5x lens for clear view of aural structures and foreign body removal procedures under magnification.
• Fibre optics produce a ring of even light for an unobstructed, glare-free view.
• Insufflation port for manipulation of the tympanic membrane (bulb not included)
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Clear direct view
360° ring of FO light allows a completely unobstructed view.

Rheostat Control
Smoothly vary the power of illumination.

Large lens
For a clear view. Slides to one side for easy cleaning.

Insufflation port
For optional pneumatic otoscopy.

Replacement bulb
Easy to replace the included bulb.

Practitioner LED Ophthalmoscope

• 6 apertures:
  • Small - allows quick entry into small, undilated pupils.
  • Medium- provides excellent view of fundus through an undilated pupil.
  • Large - general examination of the eye through dilated pupil.
  • Fixation Star - graduated cross-hairs for measuring eccentric fixation or locating lesions.
  • Slit - used to determine levels of lesions and tumors.
  • Cobalt blue - used with flourescein dye to view small lesions, abrasions and foreign objects on the cornea.
• 1 filter can be used in conjunction with any of the above apertures:
  • Red-Free filter - filters out red light for easy identification of veins, arteries and nerve fibers.
• 28 focusing lenses with a range of -25 to +40 diopters, adjustable via easy-to-reach maywheel.
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Rheostat Control
Smoothly vary the power of illumination.

Aperture Selection Disc
Switch easily between 6 apertures.

Six Apertures
A wide range of practical apertures to select from.

Red-free filter
Slide the red free filter across any of the six apertures.

Dust cover
Protect the lens from dust when not in use.

Daisywheel Focus
Easy access on either side of the head to adjust the diopters.

Replacement bulb
Easy to replace the included bulb.

AA Battery Handle

• Rheostat easily allows light output to be tailored to application.
• Heads screw into place to keep secure during use.
• Powered by standard alkaline 'AA' batteries (not included).

Easy Attachment
Diagnostic heads simply screw into place.

Rheotronic Control
Smoothly control the applied power by turning the rheostat either clockwise or anti-clockwise.

Battery power
Powered by standard 'AA' alkaline batteries (not included).

Laser Engraving

Medisave offer a laser engraving service on the handle of this diagnostic set. Because we recognise the value and quality of your tools we have invested in the highest quality equipment and technicians to give you probably the finest engraving service available in the UK (superior to our competitor’s non-free efforts). The end result is an elegant, permanent, precision mark on the surface of the handle, allowing you to show a little of your personality and, more importantly, deterring thieves and making it easier to retrieve your property should you misplace it. The service does not delay your order and next day delivery services are available. NOTE: The engraving on this item is split over two lines of 30 characters each.

HIGH QUALITY | NO DELAY | NEXT DAY DELIVERY

Hard Carry Case

• Deluxe hard case.
• Vacuum formed interior to keep instruments in place.
• Easy release safety catch.

More information: Using Ophthalmoscopes in Eye Examinations | Using Otoscopes in Ear Examinations

Medisave recommends:

"This is our best selling Keeler AA battery powered diagnostic set. The set has Practitioner heads on both the otoscope and ophthalmascope, these are excellent quality and cover all the needs of general practice. Keeler are very well renowned in the ophthalmic industry and assemble all their products by hand at their base in Windsor. The set has a great quality feel to it and comes in a high quality rigid case with spare bulbs and speculae. The RRP of this unit is in excess of £308 + Vat! "

Practitioner Ophthalmoscope

• 6 apertures:
  • Small - allows quick entry into small, undilated pupils.
  • Medium- provides excellent view of fundus through an undilated pupil.
  • Large - general examination of the eye through dilated pupil.
  • Fixation Star - graduated cross-hairs for measuring eccentric fixation or locating lesions.
  • Slit - used to determine levels of lesions and tumors.
  • Cobalt blue - used with flourescein dye to view small lesions, abrasions and foreign objects on the cornea.
• 1 filter can be used in conjunction with any of the above apertures:
  • Red-Free filter - filters out red light for easy identification of veins, arteries and nerve fibers.
• 28 focusing lenses with a range of -25 to +40 diopters, adjustable via easy-to-reach maywheel.
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Charger sold seperately

Rheostat Control
Smoothly vary the power of illumination.

Aperture Selection Disc
Switch easily between 6 apertures.

Six Apertures
A wide range of practical apertures to select from.

Red-free filter
Slide the red free filter across any of the six apertures.

Dust cover
Protect the lens from dust when not in use.

Daisywheel Focus
Easy access on either side of the head to adjust the diopters.

Replacement bulb
Easy to replace the included bulb.

More information: Using Ophthalmoscopes in Eye Examinations

The Industry Leader for Ward and GP Use

A greater number of beams and filters provide improved diagnostic capabilities.

Five beams for increased control over diagnostic functionality.

Additional blue filter that allows assessment of corneal scratches.

Practitioner Ophthalmoscope

• 6 apertures:
  • Small - allows quick entry into small, undilated pupils.
  • Medium- provides excellent view of fundus through an undilated pupil.
  • Large - general examination of the eye through dilated pupil.
  • Fixation Star - graduated cross-hairs for measuring eccentric fixation or locating lesions.
  • Slit - used to determine levels of lesions and tumors.
  • Cobalt blue - used with flourescein dye to view small lesions, abrasions and foreign objects on the cornea.
• 1 filter can be used in conjunction with any of the above apertures:
  • Red-Free filter - filters out red light for easy identification of veins, arteries and nerve fibers.
• 28 focusing lenses with a range of -25 to +40 diopters, adjustable via easy-to-reach maywheel.
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Rheostat Control
Smoothly vary the power of illumination.

Aperture Selection Disc
Switch easily between 6 apertures.

Six Apertures
A wide range of practical apertures to select from.

Red-free filter
Slide the red free filter across any of the six apertures.

Dust cover
Protect the lens from dust when not in use.

Daisywheel Focus
Easy access on either side of the head to adjust the diopters.

Replacement bulb
Easy to replace the included bulb.

More information: Using Ophthalmoscopes in Eye Examinations

This is an over-engraved clearance item - please see the photo example before purchasing.

The Industry Leader for Ward and GP Use

A greater number of beams and filters provide improved diagnostic capabilities.

Five beams for increased control over diagnostic functionality.

Additional blue filter that allows assessment of corneal scratches.

Practitioner Ophthalmoscope

• 6 apertures:
  • Small - allows quick entry into small, undilated pupils.
  • Medium- provides excellent view of fundus through an undilated pupil.
  • Large - general examination of the eye through dilated pupil.
  • Fixation Star - graduated cross-hairs for measuring eccentric fixation or locating lesions.
  • Slit - used to determine levels of lesions and tumors.
  • Cobalt blue - used with flourescein dye to view small lesions, abrasions and foreign objects on the cornea.
• 1 filter can be used in conjunction with any of the above apertures:
  • Red-Free filter - filters out red light for easy identification of veins, arteries and nerve fibers.
• 28 focusing lenses with a range of -25 to +40 diopters, adjustable via easy-to-reach maywheel.
• Soft brow-rest suitable for use with spectacles.
• Smooth, variable illumination strength and via the rheostat handle.

Rheostat Control
Smoothly vary the power of illumination.

Aperture Selection Disc
Switch easily between 6 apertures.

Six Apertures
A wide range of practical apertures to select from.

Red-free filter
Slide the red free filter across any of the six apertures.

Dust cover
Protect the lens from dust when not in use.

Daisywheel Focus
Easy access on either side of the head to adjust the diopters.

Replacement bulb
Easy to replace the included bulb.

More information: Using Ophthalmoscopes in Eye Examinations