edge lift


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edge lift

Deviation of the posterior surface of a contact lens from a sphere at a given diameter. This is produced by either the peripheral curve(s) or the edging process. Edge lift provides peripheral clearance of a rigid contact lens, which is assessed by fluorescein pattern. If the edge lift is specified axially (as an extension of the back central optic zone, measured parallel to the axis of symmetry) it is referred to as axial edge lift. If specified radially as an extension along the back optic zone radius it is referred to as radial edge lift. See optic zone diameter; back optic zone radius.
References in periodicals archive ?
Laboratory testing showed Durapore Advanced Tape outperformed competitive tapes in three key securement areas: adhesion to tubing, adhesion to skin after moisture occurs, and edge lift. In a study of pull force needed to dislodge a tube from diaphoretic/moist skin, Durapore Advanced Tape required 44 percent more force on average than other tapes.
Edge fluting or increased edge lift may be apparent.
Caption: Figure 6 Classic bull's eye pattern showing central TxZ, steep RC, 360[degrees] alignment zone and edge lift
The Burke Lift consolidates face and edge lifts in a complete 10-ton system.
Designed for face and edge lifts, it maintains a 10-ton mechanical strength in all applications.
The pediatric dressing's size and design incorporate a soft-cloth, reinforced notch for a better seal and reduced edge lift. Tegaderm 1655 is a universal, central catheter site dressing that is versatile and easy to use.
The product meets MMM-130A edge lift requirements for plastic laminate work.
-Earth work in surface excavation not exceeding 30 cm in depth but exceeding 1.5 m in width as well as 10 sqm on plan including disposal of excavated earth from cutting edge lift upto 1.5 mtr.
The peripheral fit is assessed next; the trial lenses have a standard edge lift, but an increased or decreased edge lift on the same base curve can be ordered.
The flared bottom edge lifts the grip-frame high enough your fingers can more easily slip between the gun and the supporting surface beneath it, for a quick and secure grasp.
Last Monday's Cutting Edge lifted the skirt on a boyfriend and girlfriend who had duped a documentary team into believing they were a father and daughter who were unhealthily close.
Since its launch, it has continued to evolve and now offers enhanced, advanced design features, including toric surfaces and quadrant specific edge lifts.