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Quadrant Specific Designs Explained.
Quad Sym designs allow for 4 different base curves and 4 different edge lifts. One analogy to explain Quadrant Specific Technology is to a pie. Cut a pie into 4 quarters and one of those pieces represents one Quad Sym Base Curve. If we deal only with the crust on that piece of pie, it is a Quad Sym Peripheral Curve. And the practitioner can get both separate base curve treatments with different peripheral curve treatments.
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It is not often that truly “new designs” are presented to the contact lens practitioner. The US is at that juncture with Quadrant Specific Technology.
Has a patient presented with a flat or steep area in only one quadrant on the cornea? Have you ever wished you could split the back surface in two with one half being steep and the other half being flat? Most contact lens fitters working with irregular corneas have faced these problems. The contact lens laboratories have not been able to provide designs that would address these corneal irregularities.
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