Dim view.The lenses in our eyes yellow as we age. Does this affect the light-mediated regulation of our body clocks ("Light Impacts: Hue and timing determine whether rays are beneficial or detrimental," SN: 5/27/06, p. 330)? Could it explain any age-related dysfunction? MIKE SPECINER, ACTON, MASS. Indeed, it could. The progressive browning of tissue in the eye can end up "acting like yellow-tinted sunglasses," says Elizabeth R Elizabeth R is a BBC television drama serial that was broadcast in six, 85 minute parts on terrestrial channel BBC Two from February to March 1971. Starring Glenda Jackson in the title role, it was a largely accurate, historical portrayal of the life of Elizabeth I of . Gaillard of Northern Illinois University . Moreover, the eye's lenses thicken thick·en tr. & intr.v. thick·ened, thick·en·ing, thick·ens 1. To make or become thick or thicker: Thicken the sauce with cornstarch. The crowd thickened near the doorway. 2. and the pupils shrink with age, further limiting how much light reaches the retina, notes Mariana Figueiro of Rensselaer Polytechnic Institute's Lighting Research Center. Such physical changes "can mute the light-dark signal sent to the body's master clock, presumably pre·sum·a·ble adj. That can be presumed or taken for granted; reasonable as a supposition: presumable causes of the disaster. contributing to major sleep disturbances in seniors," says Figueiro. |
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