Of course, if your microscope has an anti reflective coating, then using spirits other than those recommeded by your maker is definately a bad idea.

I use a classical monocular compound luck horseshoe type scope. Critics of this style, argue that they were always more difficult to use, as the movement of the stem drives the optics nearer your face. Some see this as a hazzard.

In truth, this is not true, it is always necessary to wear safety glasses, before looking at your occular.

There are many newer more recent, and far more complex microscopes, that REALLY are positively lethal. The biggest problem people tend to ignore, is the lamp. Often the lamp is integral to the scope, and often the lamp is mains powered.

I recommend use of a microscope with a reflective mirror. An external lamp, is always a more versatile accessory than one affixed to the base, and much safer, as there is no longer a need for the microscope you put near your head, to have any part to do with mains power.

If you like, you can take Mr fitt’s point and use a rubber lens hood, or make one out of a piece of suitable tube, but contact abrasion against the skin, occurs with prolonged use, especially if you neglect the use of safety glasses. These two minor points will greatly increase your experience, and ensure your personal safety.