Abstract: Method to establish the size of the zones of near Ac, far AL and intermediate Ai vision of a progressive lens by generating, thanks to virtual reality, a gaze map of the user while following a stimulus in at least two planes at two different distances. Once the gaze maps have been made in those two planes or more, the area of each zone is calculated from the maximum horizontal and vertical amplitudes and the points of maximum frequency. In this way, the lens is adapted to the way a user looks.

Abstract: A central area of a lens is defined with a central perimeter coinciding with a perimeter of a frame, a temporal line divides the central area into a nasal area and a temporal area, a useful perimeter is formed from the nasal area and the temporal line, a useful area is delimited by the useful perimeter, and a prescription is determined for the user. The temporal line is outside a cone with at least a 30° opening, an apex of which is in a center of rotation of a user's eye, which is an optical axis. A lens thickness is optimized according to the thickness of the perimeter of the nasal area. Subsequently a transition area is defined extending between the useful perimeter and an external perimeter of the lens.

Abstract: Finished ophthalmic lens and corresponding methods. Finished ophthalmic lens having one concave face, one convex face; an outer perimeter with a thickness within a pre-established range; a central useful area that fulfills a pre-established ophthalmic prescription, which defines a machined surface, and which has a useful perimeter that coincides with a perimeter of a pre-established frame; and an outer transition area that joins the useful perimeter of the central useful area to the outer perimeter. A transition area includes a transition surface that extends from the machined surface and as far as the outer perimeter, is continuous and a derivative thereof is continuous on all points, including a joining line between the transition surface and the machined surface.

Abstract: A method for designing and manufacturing a monofocal ophthalmic lens and corresponding lens. A surface of the monofocal ophthalmic lens is defined by: f(x,y)=a1+a2?{square root over (1?a3x2?a4y2)}+a5exp{a6x4+a7y4+a8x2y2} wherein x and y are perpendicular optical axes of the lens in a plane, wherein a1-a8 are coefficients, and wherein a5 is other than 0 and at least one of a6, a7 and a8 is other than 0, including a hyperbolic component and an exponential component. The coefficients can be calculated by an iterative calculation and the merit function as follows: fm = [ ? i ? ? i ? m i 2 ? ( ? ) ] 1 / 2 where mi is a value of an optical property at a specific viewing angle ? with respect to an optical axis of the lens, and ?i is a weighting value.

Abstract: Method for designing a progressive ophthalmic lens with a top area between a vision area and a top edge of the lens, and a bottom area between a near vision area and a bottom edge of the lens. Selecting a predesigned lens, lateral aberrations which are redistributed around an outer area, defined according to a frame chosen by the lens user, so that at least on one of intersections between top, bottom and outer areas, the aberrations adopt values higher than those in the predesigned lens.

Abstract: A central area of a lens is defined with a central perimeter coinciding with a perimeter of a frame, a temporal line divides the central area into a nasal area and a temporal area, a useful perimeter is formed from the nasal area and the temporal line, a useful area is delimited by the useful perimeter, and a prescription is determined for the user. The temporal line is outside a cone with at least a 30° opening, an apex of which is in a center of rotation of a user's eye, which is an optical axis. A lens thickness is optimized according to the thickness of the perimeter of the nasal area. Subsequently a transition area is defined extending between the useful perimeter and an external perimeter of the lens.

Abstract: Procedure for designing a progressive ophthalmic lens and corresponding lens. Procedure for designing a progressive ophthalmic lens, comprising a top area (7) between the far vision area (1) and the top edge of the lens and a bottom area (9) between the near vision area (3) and the bottom edge of the lens, which comprises an optimization stage wherein starting with a predesigned lens the lateral aberrations of the lens are redistributed around an outer area (15), defined according to a frame chosen by the future lens user, so that at least on one of the intersections between top (7) and bottom (9) areas and outer area (15), the aberrations adopt values higher than those they had in the predesigned lens.

Abstract: Finished ophthalmic lens and corresponding methods. Finished ophthalmic lens having one concave face, one convex face; an outer perimeter with a thickness within a pre-established range; a central useful area that fulfils a pre-established ophthalmic prescription, which defines a machined surface, and which has a useful perimeter that coincides with a perimeter of a pre-established frame; and an outer transition area that joins the useful perimeter of the central useful area to the outer perimeter. A transition area includes a transition surface that extends from the machined surface and as far as the outer perimeter, is continuous and a derivative thereof is continuous on all points, including joining line between the transition surface and the machined surface.

Abstract: Method for calculating an ophthalmic lens comprising [a] calculating and constructing a computational model of an initial lens with a given prescription, [b] calculating the three sections of the optical path traveled by rays using the computational model, [c] determining the first surface of a lens equivalent to the initial lens, and [d] calculating the second surface of the equivalent lens by plotting the rays through the equivalent lens and determining their point of intersection with the second equivalent surface. Each ray has an equivalent optical path equal to the initial optical path, or has at least one of the sections of the equivalent optical path equal to the corresponding section of the initial optical path. The equivalent lens thus calculated is the ophthalmic lens that is the object of the invention.