In this book Mackenzie, one of the foremost ophthalmologists of his time, included a classic description of the symptomatology of glaucoma, and was probably the first to draw attention to the increase of intra-ocular pressure as a characteristic of the condition. He introduced the term “asthenopia”, and was the first to describe sympathetic ophthalmia as a distinct disease.

An introduction to the then little-known subject of catoptrics.