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March 1947


Arch Ophthalmol. 1947;37(3):383-385. doi:10.1001/archopht.1947.00890220393014

THE OPTICAL bench is an essential adjunct to laboratory instruction in elementary ophthalmic optics. Nevertheless, the benches ordinarily employed are not designed for the teaching of ophthalmic optics and have many features which are undesirable for that purpose. I designed and had built an optical bench which in great measure has eliminated these undesirable features. The following discussion points out the difficulties experienced with the optical benches commonly available and briefly states how these are overcome in the bench here described.

One shortcoming of benches commonly available is that they are considerably too short. In experiments illustrating, for example, the dioptric effect of separating lenses or demonstrating the conoid of Sturm it is preferable to use lenses of relatively lower dioptric power and longer focal length than is possible with the ordinary bench, so that the adjustment of the lens and the screen is not critical. With the usual optical

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