PhenX Logo
please waitPlease Wait...
PhenX Logo
My Toolkit
Log In
Register

Review Measure

Essential Measures are only those items that are critical to the collection of the Measure or are necessary for the interpretation of results. Essential Measures are integral to the Measure. Without such information the data collected would be incomplete and/or misleading.
An additional PhenX Measure that the user may find helpful based on the selection of a particular PhenX Measure. Related PhenX Measures can include additional Measures that are needed to calculate a Derived Variable (e.g., Weight and Height are needed to calculate BMI), Measures that are commonly used in presentations and publications to present the value of the chosen Measures (e.g., Height and Weight by Race and Ethnicity), Measures that are conceptually related to the chosen Measure (e.g., Current Educational Attainment is conceptually related to Annual Family Income and Arm Span is conceptually related to Height), Measures that are physiologically and/or biologically related to the chosen Measure (e.g., Stroke and Heart Disease). Related PhenX Measures are suggestions only.
The Collections are an alternative to the research domains for browsing the PhenX Measures. Measures that are related by a specific topic are grouped together.

Browse » Domains » Ocular » Contact Biometry

Browse Next Measure
Measure: Contact Biometry   #110100

Definition: Axial length of the eye and central corneal thickness is measured using contact biometry and pachymetry. Depth of the anterior chamber, lens thickness and depth of the posterior chamber can also be obtained.

Purpose: Many eye diseases are known to be associated with either excessively short eyes (nanophthalmos and angle closure glaucoma) or excessively long eyes (degenerative myopia, Stickler's Syndrome). In addition, ocular biometry provides information about the thickness of the lens (for studies of cataract) and the size of the posterior chamber. Axial length of the eye is an essential measurement for selecting the proper intraocular lens when doing cataract surgery. Central corneal thickness influences intraocular pressure measurements (thicker corneas result in artificially higher pressure and thinner corneas in lower pressure). In addition thinner central corneal thickness may be an independent risk factor for optic nerve degeneration in glaucoma.

Protocols:

Collections

Vision

Keywords: Ocular, Eye, Biometry, Axial length, Los Angeles Latino Eye Study, LALES, Central corneal thickness, Pachymetry, Depth of the anterior chamber, Lens thickness, Depth of the posterior chamber

Measure Release Date: February 26, 2010

* Adding this measure to My Toolkit will add all protocols associated with this measure.

« Back To Measures List


Site maintained by RTI International Home   |   Browse   |   Search   |   My Toolkit   |   Feedback Release: November 28, 2017, Ver 22.0