TECHNICAL FIELD

This application relates generally to measuring high-order optical aberrations for an eye wearing a contact lens and making individualized contact lenses based on the measurements.

BACKGROUND

Eyes are important organs, which play a critical role in human's visual perception. An eye has a roughly spherical shape and includes multiple elements, such as cornea, lens, vitreous humour, and retina. Imperfections in these components can cause reduction or loss of vision. For example, too much or too little optical power in the eye can lead to blurring of the vision (e.g., near-sightedness or far-sightedness), and astigmatism can also cause blurring of the vision.

Corrective lenses (e.g., glasses and contact lenses) are frequently used to compensate for blurring caused by too much or too little optical power and/or astigmatism. However, when eyes have high-order aberrations (e.g., aberrations higher than astigmatism in the Zernike polynomial model of aberrations), conventional corrective lenses cannot adequately compensate for all of the aberrations associated with the eyes, resulting in blurry images even when corrective lenses are used.

SUMMARY

Accordingly, there is a need for corrective lenses that can compensate for high-order aberrations and methods and devices that can accurately measure high-order aberrations so that proper corrective lenses can be designed and/or made.

The above deficiencies and other problems associated with conventional devices and corresponding methods are reduced or eliminated by the disclosed devices and methods.

As described in more detail below, some embodiments involve a method that includes obtaining, with an optical device, information indicating one or more aberrations of an eye; and obtaining, with the optical device, information indicating one or more of a visual axis of the eye, a center of a pupil of the eye, and a corneal vertex of the eye.

Also described is an optical device including an aberrometer; a first light source for providing first light toward an eye; a lens assembly for collecting light from the eye; and a first image sensor for receiving light that has been transmitted through the lens assembly.

In accordance with some embodiments, a method for making a personalized contact lens includes selecting a surface profile based on (i) one or more aberrations of an eye and (ii) a position of a contact lens relative to one or more of a visual axis of the eye, a center of a pupil of the eye, and a corneal vertex of the eye; and fabricating a contact lens having the selected surface profile. Some embodiments include a contact lens made by any method described herein.

In accordance with some embodiments, a method for making a personalized multifocal lens includes selecting a surface profile based on (i) one or more aberrations of an eye and (ii) a position of a contact lens relative to one or more of a visual axis of the eye, a center of a pupil of the eye, and a corneal vertex of the eye. An optical zone of the surface profile is positioned based on the position of the contact lens relative to the visual axis of the eye. The surface profile includes a first region corresponding to a first optical power and a second region corresponding a second optical power that is different from the first optical power. The method also includes fabricating a contact lens having the selected surface profile. Some embodiments include a multifocal contact lens made by any method described herein.

In accordance with some embodiments, a method includes determining one or more aberrations of a combination of an eye and a contact lens positioned adjacent to the eye, and determining a location of a center of the contact lens by using a single optical device. The single optical device includes a lens assembly; and a wavefront sensor that includes: a first light source configured to emit first light and transfer the first light emitted from the first light source toward the combination of the eye and the contact lens; the lens assembly for collecting light from the combination of the eye and the contact lens; an array of lenses that is distinct from the lens assembly, the array of lenses configured to focus light transmitted through the lens assembly; and a first image sensor configured to receive light, from the combination of the eye and the contact lens, transmitted through the lens assembly and the array of lenses. The single optical device also includes a contact lens center sensor that includes: a second light source configured to emit second light and transfer the second light emitted from the second light source toward the combination of the eye and the contact lens; the lens assembly for collecting light from the combination of the eye and the contact lens; one or more lenses configured to focus light transmitted through the lens assembly, the one or more lenses being distinct and separate from the array of lenses; and a second image sensor configured to receive light, from the combination of the eye and the contact lens, transmitted through the lens assembly and the one or more lenses.

In accordance with some embodiments, a method includes transferring first light from a first light source toward a combination of an eye and a contact lens positioned adjacent to the eye; receiving, with a first image sensor, light from the combination of the eye and the contact lens, transmitted through a lens assembly and an array of lenses; determining one or more aberrations of the combination of the eye and the contact lens; transferring second light from a second light source toward the combination of the eye and the contact lens; receiving, with a second image sensor distinct and separate from the first image sensor, light from the combination of the eye and the contact lens, transmitted through the lens assembly and one or more lenses; and determining a location of a center of the contact lens.

In accordance with some embodiments, an optical device includes a lens assembly; and a wavefront sensor that includes: a first light source configured to emit first light and transfer the first light emitted from the first light source toward a combination of an eye and a contact lens positioned adjacent to the eye; the lens assembly for collecting light from the combination of the eye and the contact lens; an array of lenses that is distinct from the lens assembly, the array of lenses configured to focus light transmitted through the lens assembly; and a first image sensor configured to receive light, from the combination of the eye and the contact lens, transmitted through the lens assembly and the array of lenses. The optical device also includes a contact lens center sensor that includes: a second light source configured to emit second light and transfer the second light emitted from the second light source toward the combination of the eye and the contact lens; the lens assembly for collecting light from the combination of the eye and the contact lens; one or more lenses configured to focus light transmitted through the lens assembly, the one or more lenses being distinct and separate from the array of lenses; and a second image sensor configured to receive light, from the combination of the eye and the contact lens, transmitted through the lens assembly and the one or more lenses. The optical device also includes one or more processors; and memory storing one or more programs for execution by the one or more processors, the one or more programs including instructions for: determining one or more aberrations of the combination of the eye and the contact lens based on information corresponding to the light received by the first image sensor; and determining a location of a center of the contact lens based on information corresponding to the light received by the second image sensor.

In accordance with some embodiments, a method for making a contact lens includes selecting a surface profile based on (i) one or more aberrations of a combination of an eye and a contact lens positioned adjacent to the eye and (ii) a location of a center of the contact lens; and making a lens having the selected surface profile.

In accordance with some embodiments, a corrective lens (e.g., a contact lens) is made by any method described herein.

Thus, devices are provided with more efficient and accurate methods for performing wavefront sensing and determining vertices of contact lenses, thereby increasing the effectiveness, efficiency, accuracy, and user satisfaction with such devices. Such devices and corresponding methods may complement or replace conventional methods for performing wavefront sensing.

