CPC A61B 34/25 (2016.02) [A61B 3/1035 (2013.01); A61B 90/20 (2016.02); A61F 2/1645 (2015.04); A61F 2/1662 (2013.01); A61F 9/008 (2013.01); A61B 2034/2048 (2016.02); A61B 2034/252 (2016.02); A61B 2090/373 (2016.02); A61B 2505/05 (2013.01); A61B 2560/0475 (2013.01); A61F 2009/00844 (2013.01)] | 20 Claims |
1. An apparatus for indicating an axis of astigmatism of an eye, the apparatus comprising:
an observation unit for observing the eye;
an indication unit for indicating orientation of the axis of astigmatism of the eye;
a sensor device comprising at least one angular rate sensor configured to detect a rotation of the observation unit about its observation direction and produce sensor data that characterize a change in alignment of the observation unit in relation to the eye, wherein the sensor data is produced from the rotation of the observation unit about its observed direction; and
a computing unit, which is configured to update the orientation of the axis of astigmatism and provide the orientation of the axis of astigmatism to the indication unit as a current orientation of the axis of astigmatism for indication by the indication unit, wherein the orientation of the axis of astigmatism is updated with aid of the sensor data and from the rotation of the observation unit about its observation direction.
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