- •Day-time blue light increase alertness in elder people with significant cataracts.
- •Cataract surgery can increase blue light transmittance.
- •Blue light perception can be beneficial for the health of elder people.
Daytime blue light exposure can reduce fatigue and increase alertness in young healthy adults. Little is known of the daytime blue light influence on alertness in elders. A prospective with-in subject study was carried out in Peking University Third Hospital to evaluate the impact of cataract surgery on visual functions and the electroencephalogram alertness response to blue light stimulus before and after surgery. 14 participants diagnosed with age-related cataract were scheduled for monocular cataract surgery with ultraviolet-filtering intraocular lens (IOL) implantation. Best corrected visual acuity (BCVA), color discrimination and electroencephalogram results were measured before and after surgery. Exposure to blue light resulted in decreased delta (0.25–3.00 Hz) activity and increased beta (13.25–30.00 Hz) activity both before and after cataract surgery. Significant improvements in the BCVA and Farnsworth-Munsell-100-hue total error scores were found after cataract surgery. The partial error scores in the red-yellow, green blue-blue, and blue purple-purple red bands also showed significant differences, with the green blue-blue band showing the most obvious improvement. Day-time blue light stimulus can increase alertness in elderly people with significant cataracts. Cataract surgery with ultraviolet-filtering IOL implantation can increase light, particularly blue light transmittance. Opaque lens removal does not increase the alertness responses to blue light 1 day after surgery. Nevertheless, the increase in light especially blue light perception can be beneficial for the health of elder people in the long run.
To read this article in full you will need to make a payment
Purchase one-time access:Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online access
One-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:Subscribe to Journal of Clinical Neuroscience
Already a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
- The effect of high correlated colour temperature office lighting on employee wellbeing and work performance.J Circadian Rhythms. 2007; 5: 2
- Neuronal input pathways to the brain’s biological clock and their functional significance.Adv Anat Embryol Cell Biol. 2006; 182: 1-71
- High sensitivity of human melatonin, alertness, thermoregulation, and heart rate to short wavelength light.J Clin Endocrinol Metab. 2005; 90: 1311-1316
- The efficacy of light therapy in the treatment of mood disorders: a review and meta-analysis of the evidence.Am J Psychiatry. 2005; 162: 656-662
- Twilight times: light and the circadian system.Photochem Photobiol. 1997; 66: 549-561
- Pupil location under mesopic, photopic, and pharmacologically dilated conditions.Invest Ophthalmol Vis Sci. 2002; 43: 2508-2512
- The development of sleep in persons undergoing cataract surgery.Arch Gerontol Geriatr. 2002; 35: 179-187
- Sleep and sleepiness 1 and 9 months after cataract surgery.Arch Gerontol Geriatr. 2004; 38: 69-75
- Daytime light exposure dynamically enhances brain responses.Curr Biol. 2006; 16: 1616-1621
- Bright light effects on body temperature, alertness, EEG and behavior.Physiol Behav. 1991; 50: 583-588
- Changes in electrical activity of the brain with vigilance.Electroencephalogr Clin Neurophysiol. 1987; 66: 137-144
- The spectrum classification and rationale of ultraviolet-protective intraocular lenses.Am J Ophthalmol. 1986; 102: 727-732
- Color discrimination by patients with different types of light-filtering intraocular lenses.J Cataract Refract Surg. 2010; 36: 389-395
- The impact of cataract surgery on cognitive impairment and depressive mental status in elderly patients.Am J Ophthalmol. 2008; 146: 404-409
- Blue light-filtering intraocular lenses and post-operative mood: a pilot clinical study.Int Ophthalmol. 2015; 32: 249-256
- On light as an alerting stimulus at night.Acta Neurobiol Exp (Wars). 2007; 67: 171-178
- Daytime exposure to bright light, as compared to dim light, decreases sleepiness and improves psychomotor vigilance performance.Sleep. 2003; 26: 695-700
- Alerting effects of light are sensitive to very short wavelengths.Neurosci Lett. 2006; 399: 96-100
- Blue light exposure reduces objective measures of sleepiness during prolonged nighttime performance testing.Chronobio Int. 2009; 26: 891-912
- Short-wavelength sensitivity for the direct effects of light on alertness, vigilance, and the waking electroencephalogram in humans.Sleep. 2006; 29: 161-168
Published online: September 11, 2018
Accepted: August 13, 2018
Received: April 19, 2018
© 2018 Elsevier Ltd. All rights reserved.