Multifocal spectacles
Multifocal spectacles-
One pair of spectacles only for all distances, is that possible?
Classic bifocal spectacles:
upper part far vision, lower part near vision.
Disadvantage: medium distance blurred
Multifocal spectacles:
Continuous transition from the upper part of the glass used for far vision down to the lower part of the glass used for near vision.
Disadvantage: Sometimes rather prolonged adjusting phase, if not tolerated at all, a lot of money is lost.
Recently, several suppliers have turned very generous: If the expensive glasses are not tolerated, they can be returned free of charge and are replaced by normal reading or bifocal spectacles.
View onto multifocal spectacles with alleged progressive glasses.
The values of the refractive power measured in diopters are indicated.
View through a conventional standard multifocal glass:
At a medium desk distance, objects placed there are out of focus.
(Figures: Essilor)
View through a multifocal glass with better adjusted progressive zone -
this is the transition zone: Also objects within a medium desk distance
are focused sharply. (Figures:Essilor)
Are multifocal spectacles also suitable for monitor work?
This strongly depends on your type of work. Even though the distortion in the peripheral areas could be reduced considerably in modern, high-quality multifocal glasses, their use is certainly rather limited e.g. in CAD applications. Who does not want to compromise in terms of acuity and wearing comfort, needs to have bifocal or multifocal spectacles cumtom-made.
How is this to be understood?
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Carefully note down the conditions of your place of work. This includes distance data, such as:
Distance eye - monitor
Distance eyes - keyboard
Distance eye - paper (script or other) -
Take these data to your ophthalmologist, who is going to your your specific problem and solve it in cooperation with a trained optician.