Methods of making lenses with regressive and non-regressive rotationally symmetric optical design elements

摘要

Aspects of the present invention provide an ophthalmic lens comprising at least one regressive and at least one non-regressive rotationally symmetric optical design element. The regressive and non-regressive optical design elements can be combined so as to form a desired optical power profile for the lens while simultaneously exploiting the different relative orientation of the astigmatic vectors of the constituent regressive and non-regressive design elements, thereby resulting in reduced unwanted astigmatism. The regressive and non-regressive rotationally symmetric optical design elements can be positioned on different lens surfaces and in optical communication or can be collapsed onto the same lens surface. The regressive and non-regressive rotationally symmetric optical design elements can each contribute to the total add power of an ophthalmic lens. The regressive and non-regressive rotationally symmetric optical design elements can be combined with any other optical design feature positioned on the same or a different surface of the lens.

主权项

1. A method of making a lens, comprising:
forming a first regressive rotationally symmetric optical design element having a first perimeter that provides an optical power profile within a first optical power region in which the power continuously or discontinuously increases from the center of the first optical power region to the first perimeter; forming a first non-regressive rotationally symmetric optical design element having a second perimeter that provides an optical power profile within a second optical power region in which the power continuously or discontinuously decreases from the center of the second optical power region to the second perimeter; forming a second non-regressive rotationally symmetric optical design element having a third perimeter that provides an optical power profile within a third optical power region in which the power continuously or discontinuously decreases from the center of the third optical power region to the third perimeter, wherein the first perimeter and the third perimeter overlap; and forming a second regressive rotationally symmetric optical design element having a fourth perimeter that provides an optical power profile within a fourth optical power region in which the power continuously or discontinuously increases from the center of the fourth optical power region to the fourth perimeter, wherein the second perimeter and the fourth perimeter overlap; wherein the first regressive rotationally symmetric optical design element and the second non-regressive rotationally symmetric optical design element are located on the same surface; wherein the first regressive rotationally symmetric optical design element and the first non-regressive rotationally symmetric optical design element are located on the same surface.