How do people see with glasses

Diopter simulator: simulate visual acuity

With the help of the following graphic you can simulate a refraction-based ametropia and visually experience the visual acuity (visual acuity) at a certain diopter value. Please note: the diopter simulation can only provide a rough reference value.

Notes on use:

Why is it only possible to simulate visual acuity to a limited extent?

Visual acuity differs from person to person. Many factors play a role. This is especially true when there is astigmatism. In the graphic above, only a vertical blurring is shown, but it can occur at other angles (the associated value is the so-called axis position of the cylinder).

In addition, a person's vision, i.e. their visual acuity, is not only dependent on refraction-based parts of the dioptric apparatus, but also to a considerable extent on the number and density of sensory receptors on the retina. The uncertainty shown above is therefore based on mean values. See: Difference between dioptre and visual acuity.

In this context, the brightness also plays an important role. The brighter it is, i.e. the more ambient light there is, the more differentiated the visual information. A visual impairment increases with decreasing light intensity.

It should also be remembered that, naturally, you almost never see only a static image. Above all, seeing is also the visual perception of changes. In this respect, an image impression can be even clearer, despite the blurring, if one sees certain elements in motion and thus recognizes them.

Of course, stereoscopic vision also plays an important role: since you usually look with both eyes, you can get a spatial impression from the difference. In addition, there are often differences between the eyesight of the individual eyes - in many situations one eye takes over the "predominance".

What is this diopter simulator for?

This diopter simulator is intended to help relatives and others to get an impression of how reduced the eyesight is with a certain diopter number. It is not used for self-diagnosis. If you suspect that you can no longer see optimally, please make an appointment with an ophthalmologist or optician. Seeing is not only important from a safety point of view - above all, good vision also offers joy and quality of life. It is all too easy for many to forget what a miracle nature has endowed us with ...

Continue reading?

Image montage "Autobahn" based on two images from 123RF Images: tasfoto / neirfy

This website uses cookies, uses Google Analytics and shows interest-based advertising in order to operate the offer economically and to further improve it. Further information can be found on the data protection information page.

Ok I agree