1. These are not technically muscae volitantes, however, since they are the result of minor injury.

2. In addition to identifying some of the sources of muscae volitantes, he discovered that farsightedness is due to a shortening of the eyeball and that the blurred vision of astigmatism is caused by uneven surfaces of the cornea and lens.

3. The dark star in Nova Muscae 1991 is a black hole rather than a neutron star.