sag

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SAG

Abbreviation for:
sagittal
senescence-associated gene
Standards Assurance Group (Medspeak-UK)
statoacoustic ganglion
Swiss agammaglobulinaemia

sag 

Abbreviation for sagitta or sagittal depth; the height of a segment of a circle or sphere. See lens measure; vertex depth.
References in periodicals archive ?
The newest SynergEyes design for corneal ectasia, the ClearKone lens, is fitted on the principle of selecting a high enough sagittal depth to clear the cone, without the need for very steep base curves.
These corneas tend to have a very high sagittal depth.
This is because the steeper skirt radius adds sagittal depth and will help lift the RGP/soft junction off the cornea so that landing occurs at the soft skirt.