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This is an online version of the dataset collected from amblyopic participants in a larger study performed in the Psychophysics Lab of Max Planck Institute for Brain Research (Frankfurt/Germany) - research grants DFG SI 344/17-2,3 and CNCSIS 73/TD-48

The work was done under the supervision of Prof. Ruxandra Sireteanu (Max Planck Institute/JW Goethe University) by trained psychologist Dr. Aylin Thiel (Goethe University Hospital, Clinic for Psychiatry, Psychosomatic and Psychotherapy, Frankfurt, Germany) - interviewing, data collection, image creation - and Dr. Adrian M. Iftime (C.Davila University of Medicine, Bucharest, Romania) - data analysis. The orthoptic evaluation of the participants was performed by certified orthoptists Licia Cirina, Peggy Feige, Iris Bachert and Doris Baldauf.

The full data set collected and validated for the participants' descriptions is presented below in a format suited for browsing on computer displays. Each participant observed the stimuli with the amblyopic eye and described his perception. If the perception was temporally unstable (i.e. moving) an animated movie was created, matching the description (details in text). The "animated only" links below contain only this data set, in order to ease the understanding of the text.
The full amblyopic perception (i.e. also statically distorted perception in addition to the movies is also presented here (use " animated and static" links).

INDEX of the data set:


- In order to ease navigation, one can use the top links.
- For best viewing we recommend a display with a width:height ratio of 4:3 and a minimum 1280 x 1024 pixels resolution.
- For each participant, a panel of 4 small images/movies (thumbnails) is shown on the screen; if the frequency of the motion(s) could be calculated, it is shown on top of the image (i.e. 2 Hz, 0.5 Hz, etc).
- By clicking on a particular thumbnail, a higher resolution version of the image is shown, allowing you to see the details. The resolution of these images (800 ... 1242 pixels) should be fully visible on most computer monitors. Some browsers might automatically resize the images shown full-screen (shrinking or enlarging them), while other browsers might show part of them. Refer to your browser usage instructions on how to enable/disable this if it is a problem.
- For some particular images where the participants reported delicate details we provided a separate link to a very high resolution file (width > 800 pixels); it is best that one observes these images separately with a dedicated image viewing program (not the browser) and use a high resolution monitor.
- Some of the images depict changes in contrast, blurring or fading of colors; these changes can be viewed as recorded if the viewing monitor is gamma-calibrated. Otherwise these features will appear either as completely white or completely black.
- These images were created on calibrated computer monitors with true 8 bit brightness depth (i.e 256 levels of brightness intensity for each color). Some laptop monitors or LCD screens have a lower bitdepth; on these monitors the gray tones in the images will appear ragged or dotted (this depends also on the software used to display the images).


About the study and citation:

The study that led to this data set had been approved by the Ethics Committee of the J.W.Goethe University of Frankfurt and the testing was conducted in accordance with the tenets of the Declaration of Helsinki. Written informed consent was obtained from all participants after the purpose of the study had been fully explained. In order to preserve the anonymity and privacy of the participants they are identified here only by a two digit number. The procedures were performed in the Psychophysics Lab of Max Planck Institute for Brain Research (Frankfurt am Main / Germany), under the supervision of Prof. Ruxandra Sireteanu.

We place no restriction on the use of this data set, with the exception that we request that if anyone wishes to use it in a published work will inform us and allow us to review it before publication.

Any use of this data set must be cited as:

  • Thiel A., Iftime A. (2016), Temporal instabilities in amblyopic perception: a quantitative approach. Perception, doi:10.1177/0301006615625796 [link]

Refer to the above article for a full explanation of the investigation procedures and for the results. Further details about this larger set set are published in:

  • Iftime A (2009), New Psychophysical Methods for Investigation of Amblyopic Patients. Doctoral dissertation, Carol Davila University of Medicine, Bucharest (also available translated in Romanian, with the title “Metode psihofizice noi de investigare a pacientilor cu ambliopie”)
  • Thiel, A. (2009). Reizspezifische Fehlwarhenhmungen von erwachsenen Personen mit Amblyopie. Doctoral disseration, Johann Wolfgang Goethe-Universitaet, Frankfurt am Main.
  • Iftime, A. M., Thiel, A. & Sireteanu, R. (2008). An objective evaluation of temporal instabilities in amblyopic perception. Perception 37, ECVP Abstract Supplement, 112.
  • Iftime, A. M., Thiel, A. & Sireteanu, R. (2007). An Objective Evaluation of Information Loss in Amblyopic Perception. Eur Biophys J 36, EBSA Abstract supplement 1.


This work was supported by grants from the Deutsche Forschungsgemeinschaft to R. Sireteanu (SI 344/17-2,3) and partly from Romanian CNCSIS to A.Iftime (TD-48/2008)

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