Improvements relating to the fitting of spectacles

A technology for glasses and lenses, applied in the field of glasses, can solve the problem of unmeasured pupil distance, glasses frame size, etc., and achieve the effects of improved visual quality, easy and convenient use, and increased accuracy

Inactive Publication Date: 2010-08-11
CT METER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pupillometers described above do not measure pupillary distance accurately enough to correctly determine the position of the optical center on the patient's pupil
Furthermore, the pupillometer does not measure the pupillary distance and pupillary center position relative to the optical center of the lens or the size of the spectacle frame

Method used

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  • Improvements relating to the fitting of spectacles
  • Improvements relating to the fitting of spectacles
  • Improvements relating to the fitting of spectacles

Examples

Experimental program
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Effect test

Embodiment Construction

[0039] figure 1 A system 2 for measuring and recording the position of a patient's pupil relative to spectacle lenses worn by the patient is shown in . The system 2 includes a handheld device 4; a docking station 6 for the handheld device 4 incorporating an interface 10 for providing power from the docking station 6 to recharge the battery 30 (shown in FIG. 3 ) of the handheld device 4 and facilitates data communication between the handheld device 4 and the docking station 6 ; and the printout device 8 .

[0040] by reference Figure 2a with 2b The handheld device 4 according to the first embodiment of the invention is described in more detail. Mounted in the housing 12 are a first optical lens assembly 14a and a second optical lens assembly 14b, which are also referred to as "dual optical assemblies", each containing an optical lens 13 ( Figure 3ashown in ), lens 13 may have automatic or fixed focus components. Installed behind each assembly 14a, 14b and inside the hous...

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Abstract

A handheld device for aligning a lens with the eye of a patient. The device comprises means for capturing and storing an image of a patient wearing spectacles, and processing means for determining on the image the centre of a pupil of the patient, and indicating on a display the position of the lens over the eye of the patient wherein the optical centre of the lens is aligned with the pupil of the patient.

Description

technical field [0001] The present invention relates to spectacles. In particular, the invention relates to the correct alignment of spectacle lenses with the pupils of the spectacle wearer's eyes. Background technique [0002] When fitting eyeglasses it is important to ensure that the optical center of the fitted lens is correctly positioned relative to the patient's pupil. Ideally, the optical center of the lens should be located on the center of the patient's pupil. This is especially important when the lens is a zoom lens. The location of the optical center of the lens also depends on the function of the glasses being dispensed (eg, nearsightedness or longsightedness). For example, the optical center of the lenses for reading glasses is closer to the bridge of the glasses than the optical centers of lenses for long-sightedness. If the optical centers of a lens are not aligned accurately, the effectiveness of that lens is reduced. [0003] The current eyeglass fittin...

Claims

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Application Information

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IPC IPC(8): A61B3/11G02C13/00
CPCG02C13/005A61B3/10
Inventor 亚当·西蒙斯
Owner CT METER
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