Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1980-04-08
1982-07-20
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
351 14, 356 42, A61B 310
Patent
active
043402810
ABSTRACT:
Endothelial cell density is determined by comparing the specular image of the endothelium at a predetermined magnification with a set of grids each having a plurality of apertures formed in a hexagonal, honeycomb pattern. The apertures in each of the grids are closely spaced and of predetermined size corresponding to a predetermined cell density at the predetermined magnification.
REFERENCES:
patent: 4219257 (1980-08-01), Slappey et al.
Bovernick Rodney B.
Corbin John K.
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