Caterna | Updates

By Michael Scherrer

Caterna Answers Frequently Asked Questions - Part 1


Dear Companists,

First of all, we would like to thank the Companists for their confidence, investment, and the plentiful feedback. Since there were still many open questions, we will take this update and the next one as an opportunity to answer them.


Does the Caterna Vision Training also work for adults?

The Caterna Vision Training is designed for children up to the age of 12 or 14. This target group is also covered by the selective contracts. In recent years, however, the question of whether amblyopia therapy is still possible after the age of 14 has been intensively discussed and researched, particularly at the University of Frankfurt (Main). The main question is whether brain plasticity is sufficient enough to reactivate the connection to the amblyopic eye even in older age.

We currently have a few adult subjects who are trying out Caterna with their ophthalmologists. Certainly, much will happen in this area in the future.

For our current business, however, we concentrate exclusively on children up to the age of 12 years and, in exceptional cases, 14 years.


Are there clinical studies on the effectiveness of Caterna Vision Training?

As early as 1995, a research group at the Technical University of Dresden began developing computer-assisted visual training in amblyopia. The innovative procedure was investigated in two clinical studies and was subsequently developed to the finished practical application. The Caterna procedure is suitable to stimulate a visual acuity development that is stagnating under occlusion. It particularly helps to improve separation difficulties such as the correct recognition of rows of letters and numbers.

We have compiled the results of the studies and the publications here:


Are there cases where the Caterna Vision Training cannot be applied?

Epilepsy is a contraindication for Caterna vision training.

The Caterna Vision Training must not be used if there are contraindications for the general use of computers or computer monitors and for screen activities, e.g. for children who have previously had epileptic seizures or there is a similar tendency among family members.

I would like to have a look at the Caterna Vision Training; can I get a demo version?

We are happy to explain the Caterna Vision Training and demonstrate it live. Please contact us at

On our website we also have demo videos (, which focus on how the therapy works ("How-to", how to log in, etc.).


How long does the patient have to do the therapy?

The child carries out the Caterna therapy according to a doctor's prescription. This is usually between 30 and 45 minutes every day. The age of a child also plays a role. The therapy lasts a total of 90 days. In about 10% of cases, the doctor prescribes follow-up therapy after the end of the therapy, either to further improve upon the therapeutic success or to maintain the achieved result within the framework of a maintenance occlusion therapy.


How does the Caterna therapy work?

The aim of the Caterna Vision Training is to improve visual acuity and to activate the transmission of stimuli from the weak (amblyopic) eye through effective visual stimulation. This is made possible by the special Caterna wave pattern that can be seen in the background of exciting online games. This drifting sinusoidal wave pattern on the desktop background can have a neurosensory effect on visual processing. The wave pattern is set individually for each patient (depending on the visual acuity and refraction value) in accordance with the type of amblyopia. While the wave pattern runs in the background of the screen, the child plays various age-appropriate games, which capture the child's attention, on the home computer. This trains the weak eye. The healthy eye is covered (occluded) during this visual exercise.


I hope that we have been able to clarify some important questions from you. If you would like more details on these questions, simply comment on this update and we will answer your question. Due to the number of different questions we will publish a second part next week. If you have a specific question, you can also leave it in the comments area and we will consider it in the next update.

With kind regards

Michael Scherrer


Only registered Companists can comment. Please log in to leave a comment.


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