title: Calcification of soft contact lenses in patient with dry eye and elevated calcium concentration in tears.
abstract: Following radiotherapy for an extensive intraepithelial carcinoma of the conjunctiva and eyelid, a patient developed opacification of soft contact lenses used on the same side. Calcilm was demonstrated within the contact lenses by cytochemical methods and by energy-dispersive x-ray microanalysis. The phenomenon was associated with unilateral tear insufficiency and an elevated tear calcium level as determined by atomic absorption spectrophotometry.
mesh_terms: D002118:Calcium / Q000378:metabolism; D003263:Contact Lenses, Hydrophilic; D005260:Female; D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000628:therapy*; D008875:Middle Aged; D055095:Optics and Photonics; D013666:Tears / Q000378:metabolism*
chemical_list: D002118:Calcium