Crowding

The world is complex and our vision must distinguish many things from each other, even when they are many and close together.

Vision charts are designed with the crowding effect in mind for several reasons, all aimed at ensuring accurate and reliable visual acuity measurements and improving the diagnostic process:

  1. Representative of real situations: In reality, people often experience situations where objects are tightly packed together, e.g. when reading fine print or navigating a busy street. By including the crowding effect on eye charts, the optometrist can better assess how a person's vision will perform in real-world situations.
  2. Diagnosing visual disorders: The crowding effect may be more pronounced in people with certain vision disorders such as amblyopia ("lazy eye") or dyslexia. By evaluating how crowding affects a person's ability to read the eye chart, the optometrist can detect and diagnose these conditions more effectively.
  3. Differentiation between normal and abnormal visual conditions: The crowding effect can vary between people with normal vision and those with certain visual impairments. By observing how crowding affects a person's visual acuity, the optometrist can differentiate between normal vision conditions and those that indicate an underlying vision disorder.
  4. Optimization of visual acuity measurements: By including the crowding effect on eye charts, the optometrist can obtain more accurate and reliable visual acuity measurements. This can help ensure that the patient receives the correct prescription for glasses or contact lenses and receives the most suitable vision correction.

Overall, the design of vision tables with the crowding effect helps improve the diagnostic accuracy and clinical assessment of a person's vision, resulting in better treatment and care of vision-related problems.

Horror Vacuum – the fear of the empty space…

In certain cases, when an ad is overflowing with too much information, images or graphic elements, one can speak of a "horror vacuum".

When an ad suffers from a “horror vacuum” like this, it can be difficult for the audience to focus or understand the message clearly due to the visual noise and overload. This can result in a feeling of confusion, frustration or even indifference in those viewing the ad.

To avoid this kind of “horror vacuum”, it is important for designers to create ads that are well-balanced, simple and easy to read. This may involve limiting the number of information, images or graphic elements and ensuring that each element serves a purpose and contributes to the overall effectiveness of the ad.

 

Horror Vacuum – on display charts!

The design of vision charts seems to suffer from the "Horror Vacuum" in that it is as if the entire barn must be filled at all costs, even if it strongly impairs the result and comparison possibilities between vision tests.

When we get down over the chart and shapes/letters get smaller, an arbitrary number of extra shapes/letters are loaded into the row. It moves on the one hand with the degree of difficulty, but on the other hand it is compensated because the small characters are placed at a great distance.

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