LENTE OFTALMICA,IN PARTICOLARE PER FORTE MIOPIA

LENTE OFTALMICA,IN PARTICOLARE PER FORTE MIOPIA

An ophthalmic lens is described having a front face which is a surface of revolution and is located entirely in front of the transverse plane tangential to its center. The curve representing the half-meridian of this front face corresponds to the following general formula: x=ay2+by alpha +cy gamma i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BETTIOL BRUNO, LENNE WILLIAM, HARSIGNY CHRISTIAN
Format: Patent
Sprache:ita
Schlagworte:
CONTACT LENSES
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SPECTACLES
SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
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Beschreibung
Zusammenfassung:An ophthalmic lens is described having a front face which is a surface of revolution and is located entirely in front of the transverse plane tangential to its center. The curve representing the half-meridian of this front face corresponds to the following general formula: x=ay2+by alpha +cy gamma in which the coefficient a is different from zero and negative, at least one of the coefficients b and c is different from zero and positive, alpha is a real number which is greater than or equal to 3 and less than 4, and gamma is a real number which is greater than or equal to 4.