Apps that test visual function at home can discover deterioration of the eye’s macula lutea long before traditional vision tests. A doctoral thesis at Sahlgrenska Academy explored this issue.
Age related changes to the eye’s macula lutea, so-called macular degeneration, is a common cause of severe vision loss in persons over 60. However, existing drugs that are given as injections into the eye can slow visual impairment in the so-called “wet” type.
And, as the disease is chronic, it requires continuous treatment. Decisional for treatment success, is that flare-ups with new wet changes are discovered at an early stage, before any permanent damage is done to the macular cells.
Long waiting period
However, the wait time for treatment is long and during the waiting period, the patient risks losing visual function that is irreversible.
Researchers at Sahlgrenska Academy have now developed two new vision tests for mobile telephones. The apps that were developed under the supervision of Researcher Lars Frisén, make it possible to test vision function at home and then send the test results to an eye clinic for analysis. A thesis that evaluated the vision tests showed that they would be able to replace a portion of the controls that are currently done in eye clinics.
Better than traditional examinations
“Our studies show that the apps are better than traditional examinations done at the clinic. It opens the possibility for the apps to be able to replace many patient visits and in this way, free up healthcare resources and reduce wait times,” says doctoral candidate Christina Winther.
Both tests are self administered. The first, with the product name of MultiBit, uses numbers built up of small bright dots. The numbers appear very briefly on the screen and then disappear. Then it is up to the patient to repeat those numbers out loud. Varying the number of dots, varies the level of difficulty. The answers are taped and compared to a facet, where the results can then be sent to the clinic.
The second app, called Celego, works according to the same principle, but is a reading test that shows both letters and numbers in continuously changing new combinations and sizes.
“Being able to read better after treatment is what many patients feel is most valuable to their daily life. Currently, we are not investigating this in a controlled way, but this provides a simple and standardized way to examine the patients’ reading capabilities and speed,” says Christina Winther.
Link to the thesis: http://hdl.handle.net/2077/40885
Macular degeneration damages the function in the central visual field, which affects such things as reading ability and visual acuity. The condition is treated by drugs injected into the eye in connection with a simpler surgical procedure.
Christina Winther, Doctoral Candidate at Sahlgrenska Academy, University of Gothenburg
Lars Frisén, Researcher, Sahlgrenska Academy, University of Gothenburg
Calle Björned | idw - Informationsdienst Wissenschaft
Rabies viruses reveal wiring in transparent brains
19.01.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn
On track to heal leukaemia
18.01.2017 | Universitätsspital Bern
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
19.01.2017 | Earth Sciences
19.01.2017 | Life Sciences
19.01.2017 | Physics and Astronomy