Cited by 315Circadian rhythm and melatoninIntraocular Surgery and LensesOphthalmology and Visual Impairment Studies

Circadian photoreception: ageing and the eye's important role in systemic health

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Turner, P L, Mainster, M A·2008·British Journal of Ophthalmology

Abstract

AIM: To analyse how age-related losses in crystalline lens transmittance and pupillary area affect circadian photoreception and compare the circadian performance of phakic and pseudophakic individuals of the same age. METHODS: The spectral sensitivity of circadian photoreception peaks in the blue part of the spectrum at approximately 460 nm. Photosensitive retinal ganglion cells send unconscious information about environmental illumination to non-visual brain centres including the human body's master biological clock in the suprachiasmatic nuclei. This information permits human physiology to be optimised and aligned with geophysical day-night cycles using neural and hormonal messengers including melatonin. Age-related transmittance spectra of crystalline lenses and photopic pupil diameter are used with the spectral sensitivity of melatonin suppression and the transmittance spectra of intraocular lenses (IOLs) to analyse how ageing and IOL chromophores affect circadian photoreception. RESULTS: Ageing increases crystalline lens light absorption and decreases pupil area resulting in progressive loss of circadian photoreception. A 10-year-old child has circadian photoreception 10-fold greater than a 95-year-old phakic adult. A 45-year-old adult retains only half the circadian photoreception of early youth. Pseudophakia improves circadian photoreception at all ages, particularly with UV-only blocking IOLs which transmit blue wavelengths optimal for non-visual photoreception. CONCLUSIONS: Non-visual retinal ganglion photoreceptor responses to bright, properly timed light exposures help assure effective circadian photoentrainment and optimal diurnal physiological processes. Circadian photoreception can persist in visually blind individuals if retinal ganglion cell photoreceptors and their suprachiasmatic connections are intact. Retinal illumination decreases with ageing due to pupillary miosis and reduced crystalline lens light transmission especially of short wavelengths. Inadequate environmental light and/or ganglion photoreception can cause circadian disruption, increasing the risk of insomnia, depression, numerous systemic disorders and possibly early mortality. Artificial lighting is dimmer and less blue-weighted than natural daylight, contributing to age-related losses in unconscious circadian photoreception. Optimal intraocular lens design should consider the spectral requirements of both conscious and unconscious retinal photoreception.

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Crossref · 10.1136/bjo.2008.141747

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  • Pseudophakia improves circadian photoreception at all ages, particularly with UV-only blocking IOLs that transmit blue wavelengths.

    “Pseudophakia improves circadian photoreception at all ages, particularly with UV‐only blocking IOLs that transmit blue wavelengths.”

    From The inner clock-Blue light sets the human rhythm (2019) · cites this paper as [50]

  • Results showed a 10-fold greater circadian photoreception in young children (10 years old) than adults (95 years old) with phakic eyes.

    “Results showed a 10‐fold greater circadian photoreception in young children (10 years old) than adults (95 years old) with phakic eyes.”

    From The inner clock-Blue light sets the human rhythm (2019) · cites this paper as [50]

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  1. [37]Gallagher III FW Beasley WH Gohren CF Green thunderstorms observed. Bull Am Meteorol Soc 1996; 77: 2889– 97
  2. [56]Lee H-C Introduction to color imaging science. Cambridge: Cambridge University Press, 2005

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Authors
Turner, P. L., & Mainster, M. A.
Affiliations
University of Kansas (US)
Corresponding author
Mainster, M A
Venue
British Journal of Ophthalmology
Publisher
BMJ
Published
2008-08-29
Volume
92
Issue
11
Pages
1439-1444
ISSN
0007-1161 (ISSN-L)
OpenAlex
W2105350887
Cited by
315
References
119
Citations by year
2026: 9 · 2025: 17 · 2024: 17 · 2023: 26 · 2022: 20 · 2021: 30 · 2020: 17 · 2019: 16 · 2018: 19 · 2017: 21 · 2016: 12 · 2015: 17 · 2014: 17 · 2013: 12 · 2012: 21
FWCI
1.59
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • British Journal of Ophthalmology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Ophthalmology › Intraocular Surgery and Lenses
  • Health Sciences › Medicine › Epidemiology › Ophthalmology and Visual Impairment Studies
Keywords
circadian photoreception, aging, pupil size, pseudophakia, non-visual photoreception, retinal ganglion cells, suprachiasmatic nucleus, melatonin suppression, blue light, circadian rhythm disruption, artificial lighting, intraocular lens design
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Aging, Child, Circadian Rhythm, Eye Protective Devices, Female, Humans, Lens, Crystalline, Male, Middle Aged, Pupil, Refraction, Ocular, Scattering, Radiation, Ultraviolet Rays, Pseudophakia, Photoreceptor Cells, Vertebrate

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