A conformable covering comprises an outer portion with rigidity to resist movement on the cornea and an inner portion to contact the cornea and provide an environment for epithelial regeneration. The inner portion of the covering can be configured in many ways so as to conform at least partially to an ablated stromal surface so as to correct vision. The conformable inner portion may have at least some rigidity so as to smooth the epithelium such that the epithelium regenerates rapidly and is guided with the covering so as to form a smooth layer for vision. The inner portion may comprise an amount of rigidity within a range from about 1×10−4 Pa*m3 to about 5×10−4 Pa*m3 so as to deflect and conform at least partially to the ablated cornea and smooth an inner portion of the ablation with an amount of pressure when deflected.

A contact lens product includes a multifocal contact lens and a buffer solution. The multifocal contact lens includes a central region and at least one annular region. The annular region concentrically surrounds the central region. A diopter of the annular region is different from a diopter of the central region. The multifocal contact lens is immersed in the buffer solution, and the buffer solution includes a cycloplegic agent.

An implementation of an optical system for expanding the field of view can include a first optical element and a second optical element. The first optical element can include a first surface and a second surface. The first surface can be configured to reflect a first light beam incident on the first surface at a first incident angle greater than a first predetermined angle, and the second surface can be configured to reflect the reflected first light beam towards a location. The second optical element can include a third surface and a fourth surface. The third surface can be configured to reflect a second light beam incident on the third surface at a second incident angle greater than a second predetermined angle, and the fourth surface can be configured to reflect the reflected second light beam towards the location. Related apparatus, systems, techniques and articles are also described.

The object of the invention relates to a method of designing a colour filter for modifying human colour vision by defining the spectral transmission function of the colour filter such as to maximise colour discrimination between more than one element, colour sample, of a colour sample set when a targeted human eye, the colour vision of which is to be modified, is viewing the colour sample set with the colour filter, and at the same time such as to minimise the difference between the colour identification of the colour samples by the targeted eye and a reference eye having a reference colour vision. The object of the invention also relates to such a colour filter, such a colour filter set, and the use of such colour filter and a method for modifying human colour vision.

Optimizing a spectacle lens for a wearer of implanted intraocular lenses. The method includes providing individual refraction data on the at least one eye of the spectacle wearer; defining an individual eye model in which at least a shape and/or power of a cornea, in particular a corneal front surface, of a model eye, a cornea-lens distance, parameters of the lens of the model eye, and a lens-retina distance are defined as parameters of the individual eye model. Here, defining the parameters of the individual eye model takes place on the basis of data on visual acuity correction of the at least one eye having the intraocular lens and further on the basis of individual measurement values for the eye of the spectacle wearer and/or standard values and/or on the basis of the provided individual refraction data such that the model eye has the provided individual refraction data.

An electronic device comprises a distance detecting sensor for detecting a distance from a user to a target object, a light detecting sensor for detecting light intensity of external environment, a nine-axis sensor for detecting the user's motion, a control unit for determining whether the user is at high risk of vision loss based on the distance information output from the distance detecting sensor, the light intensity information output from the light detecting sensor, and the motion information output from the nine-axis sensor, and generating an alert command when it is determined that the user is at high risk of vision loss; and a vibrator for providing an alert based on the alert command output from a control unit.

Light weight ophthalmic lenses include a curved back lens attached to a curved front lens assembly having a functional element. An ophthalmic lens includes a curved front lens assembly and a curved back lens. The curved front lens assembly has an essentially constant thickness, forms an external world-side convex surface of the ophthalmic lens, and includes a functional element operable to modify an image of a real world scene viewed via the ophthalmic lens. The curved back lens forms an external user-side surface of the ophthalmic lens, has a world-side convex surface that is shaped complementary to and interfaced with the front lens assembly, and provides a prescribed vision correction.

Configuring ophthalmic lenses that reduce oblique aberrations based on a wearer's accommodative demand values is disclosed. The accommodative demand values include A_(rel−) and A_(rel+) depend on object vergence L. The accommodative demand values are considered to and ensure no or reduced eye strain to the wearer. An improved merit function Φ′ is calculated based on the accommodative demand values. In the calculation, accommodative term A is a smooth and continuous function of both the object distance L and the spherical component of the power error. This ensures the accommodative demand values are well below maximum relative accommodations available to the wearer to prevent eye fatigue. The calculation may also include a smooth and continuous thresholding function ƒ that optimizes the merit function. The calculation may also include evaluation of the power error associated with various object vergencies for every direction of sight.

The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves heating a silicone hydrogel contact lens in an aqueous solution in the presence of a watersoluble, highly branched, thermally-crosslinkable hydrophilic polymeric material having positively-charged azetidinium groups, to and at a temperature from about 40° C. to about 140° C. for a period of time sufficient to covalently attach the thermally-crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one azetidinium group and one of the reactive functional groups on and/or near the surface of the silicone hydrogel contact lens, thereby forming a crosslinked hydrophilic coating on the silicone hydrogel contact lens. Such method can be advantageously implemented directly in a sealed lens package during autoclave.

The present invention provides eyeglass lenses for vision correction, characterized in that transparent eyeglass lenses include lines which are provided on the eyeglass lenses, block a part of a user’s field of view, and induce a holographic phenomenon in which the lines are placed in a space rather than a plane when the user sees a subject through the eyeglass lenses.