Patent ID: 7467870
Filing Date: 2008-12-23
Classification: A61B

Abstract:
1. A reflectometry instrument to measure macular pigment of a macula of a human eye, comprising: a light source for emitting an illumination beam in a direction toward the macula; a spectrometer for measuring a detection beam, the detection beam being a portion of the illumination beam reflected from the macula, the detection beam being indicative of the amount of macular pigment in the macula; a first lens for transmitting the illumination beam to the macula and for transmitting the detection beam from the macula to the spectrometer, the first lens including an anti-reflection coating; and a second lens adjacent to the first lens, the second lens being adapted to transmit the illumination beam to the macula and for transmitting the detection beam from the macula to the spectrometer, the second lens including an anti-reflection coating, wherein the illumination beam and the detection beam remain separated when the illumination beam and the detection beam pass through the first lens and the second lens.