High performance selective light wavelength filtering providing improved contrast sensitivity

A selective and selected technology, applied in optics, optical components, instruments, etc., can solve the problems of lipofuscin toxicity, reduce dark vision sensitivity, and improve color distortion

Inactive Publication Date: 2009-12-02
HIGH PERFORMANCE OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] 4) Blue light causes lipofuscin to become toxic
As mentioned above, this reduces dark vision sensitivity and increases color distortion

Method used

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  • High performance selective light wavelength filtering providing improved contrast sensitivity
  • High performance selective light wavelength filtering providing improved contrast sensitivity
  • High performance selective light wavelength filtering providing improved contrast sensitivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0209] Example 1 : Manufactures polycarbonate lenses with integral films containing various concentrations of blue-blocking dyes, as Figure 45 The transmission spectrum of each lens was measured as shown in . Perylene concentrations of 35, 15, 7.6 and 3.8 ppm (weight basis) at 2.2 mm lens thickness were used. The various metrics calculated for each lens are shown in Table IV, with references corresponding to Figure 45 reference number in . Since the selective absorbance of light depends primarily on the product of the dye concentration and the coating thickness according to Beer's law, it is believed that comparable results can be achieved by using a hard coat and / or a primer in addition to or in place of the film.

[0210] Table IV

[0211] lens

attached drawings

mark

photopic vision

ratio

(V λ )

dark vision

ratio

(V′ λ )

day and night

Law ratio

(M' λ )

phototoxicity ratio

rate ...

Embodiment 2

[0216] Example 2: Contrast sensitivity was tested in 9 patients using 1X and 2X dye concentrations with a clear filter as a control. Seven of the nine patients showed an overall improved contrast sensitivity according to the Functional Visual Acuity Contrast Sensitivity Test (FACT). See Table VI:

[0217]

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PUM

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Abstract

The present invention relates to ophthalmic systems comprising a selective light wavelength filter, wherein said selective filter provides improved contrast sensitivity.

Description

Background of the Invention [0001] Electromagnetic radiation from the sun continues to bombard Earth's atmosphere. Light consists of electromagnetic radiation that travels in waves. The electromagnetic spectrum includes radio waves, millimeter waves, microwaves, infrared light, visible light, ultraviolet light (UVA and UVB), x-rays, and gamma rays. The visible spectrum includes the longest visible wavelength of approximately 700 nanometers and approximately 400 nm (nanometers or 10 -9 meters) the shortest wavelength. Blue light wavelengths fall within the approximate range of 400 nanometers to 500 nanometers. For the UV band, UVB wavelengths are 290 nm to 320 nm and UVA wavelengths are 320 nm to 400 nm. Gamma and x-rays make up the higher frequencies of the spectrum and are absorbed by the atmosphere. Ultraviolet radiation (UVR) has a wavelength spectrum of 100-400 nanometers. Most UVR wavelengths are absorbed by the atmosphere, with the exception of stratospheric ozone-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/10
CPCG02C7/102G02C7/104
Inventor A·W·伊沙克J·N·哈多克W·科科纳斯基D·P·杜斯丁V·S·艾尔R·D·布伦S·P·麦金尼斯M·佩卡德尤斯
Owner HIGH PERFORMANCE OPTICS
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