Abstract
LONDON. Optical Society, April 6.—Sir Frank Dyson, president, in the chair.—H. H. Emsley and E. F. Fincham: Diffraction haloes in normal and glaucoma-tous eyes. Every normal eye, under appropriate conditions, sees diffraction rings or haloes encircling bright sources of light. Similar, haloes are seen by eyes in certain abnormal pathological conditions, particularly in the case of eyes suffering from glaucoma. Tests are specified by means of which the different, phenomena in the two cases may be identified.—E. W. Taylor: The effect of changes of surface curvature at the focus of an astronomical object glass. The balancing of the components of a large object glass is difficult, and the effect at the focus of a similar alteration of curvature at each of the four surfaces is different. If the effect of an alteration at each surface is known, the one most suitable may be chosen, having regard to the nature of the aberration to be overcome.
Article PDF
Rights and permissions
About this article
Cite this article
Societies and Academies. Nature 109, 566–567 (1922). https://doi.org/10.1038/109566b0
Issue Date:
DOI: https://doi.org/10.1038/109566b0