Biomaterial Database

In vivo lens density measurements using the IntraOptics opacity lensmeter. 1990

R L Jones, and R P Kratz

Department of Ophthalmology, University of California, Irvine.

We evaluated 589 eyes using the IntraOptics opacity lensmeter 701. Twenty-one eyes contained poly(methyl methacrylate) intraocular lenses. The patients in the phakic group (578 eyes), who had no ocular pathology other than refractive error or cataracts, averaged 60.3 years of age, had an average visual acuity of 20/30, and displayed an average lens density as measured with the opacity lensmeter of 22.09. The data were analyzed for the effect of age upon density using various regression models. The best fit was obtained with an exponential model: Density = 6.2 x e(0.02 x Age), with a correlation coefficient of 0.759. The average density for the pseudophakic group (mean age = 68.5) was 9.23. Neither cortical nor posterior subcapsular cataracts were well recorded. Our results indicate that the IntraOptics opacity lensmeter is a rapid and accurate instrument for documenting nuclear cataract changes. The opacity lensmeter may prove useful not only as a clinical tool for monitoring cataract progression but also as an "electronic" second opinion.

UI	MeSH Term	Description	Entries
D007908	Lens, Crystalline	A transparent, biconvex structure of the EYE, enclosed in a capsule and situated behind the IRIS and in front of the vitreous humor (VITREOUS BODY). It is slightly overlapped at its margin by the ciliary processes. Adaptation by the CILIARY BODY is crucial for OCULAR ACCOMMODATION.	Eye Lens,Lens, Eye,Crystalline Lens
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D008954	Models, Biological	Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.	Biological Model,Biological Models,Model, Biological,Models, Biologic,Biologic Model,Biologic Models,Model, Biologic
D009885	Ophthalmology	A surgical specialty concerned with the structure and function of the eye and the medical and surgical treatment of its defects and diseases.	Ocular Surgery,Ocular Surgeries,Surgery, Ocular
D002386	Cataract	Partial or complete opacity on or in the lens or capsule of one or both eyes, impairing vision or causing blindness. The many kinds of cataract are classified by their morphology (size, shape, location) or etiology (cause and time of occurrence). (Dorland, 27th ed)	Cataract, Membranous,Lens Opacities,Pseudoaphakia,Cataracts,Cataracts, Membranous,Lens Opacity,Membranous Cataract,Membranous Cataracts,Opacities, Lens,Opacity, Lens,Pseudoaphakias
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D003720	Densitometry	The measurement of the density of a material by measuring the amount of light or radiation passing through (or absorbed by) the material.	Densitometries
D004867	Equipment Design	Methods and patterns of fabricating machines and related hardware.	Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293	Adolescent	A person 13 to 18 years of age.	Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths