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Magnifiers and other Optical Devices

Magnifiers and Other Optical Devices

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Ultimately the choice of which low vision device is most appropriate to the requirements of an individual can only be assessed by a trial of all the available units. As a rule the least practical devices are those that are the most requested - spectacles. Generally the simpler the unit the more easily it will be to use.

In the UK low vision services are provided by a number of agencies, ranging from vision charities, high street Opticians, specialist Low Vision Practitioners and also under the auspices of the Social Services and the Hospital Eye Service. Some of these agencies are listed on our link page, and to ensure the optimum device is made available, a full Low Vision Assessment is always advisable.

The benefits of the various types of available magnifier units are:

Type of Magnifier

 

Advantages

 

Disadvantages

Hand Held Device

 

Inexpensive

Easily acquired

Convenient

Tolerant of poor technique

Internal illumination
(if required)

 

Difficult to hold

Reduced field of view at longer ranges

Unusable if Hand Tremor Present

Stand Mounted Device

 

Hands free use

Tolerant of tremors, etc.

Internal illumination
(if required)

 

Require flat surface

Stand may obstruct light

Stand may obstruct use

 

Spectacle Mounted

 

Hands free use

Wide field of view

More acceptable to spectacle wearers

Easily upgraded

Modular designs

 

 

Very short working distances

Very blurred distance vision

Illumination difficult

Binocular units

Restricted to 3x magnification

Initially expensive

 

 

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