Defective sight
In this experiment you can experience various sight defects. These spectacles give an impression of having a cataract or cloudy lens.
Many diseases cause problems with sight. This experiment allows you to experience various sight defects. Two examples are cataracts, which is caused by too high a pressure in the eye, and a cloudy lens, which may arise with increasing age. Treatment with eye drops can reduce the pressure, and a cloudy lens can be exchanged for an artificial one.