Collection of spectacles (289), spectacle lenses (93) mounted on pyramid fitting, with labels attached as detailed on list "the evolution of the Bi-focal lens" (neg nos S.M. 2007) may be sold to the public, see R.P. 24/599, dr. Van Rohr. See individual stroke records for more details.
Pyramid shaped exhibition panel mounted with a selection of 93 clear and coloured lenses. The display board is part of the Duncombe Collection of spectacles, which deals with the various types of eye defect that can be rectified with eyeglasses. These include correction for hypermetropia, presbyopia, myopia, astigmatism and strabismus.