Most Read Articles
2 days ago
The types of bariatric surgery differentially affect the risk of developing acute pancreatitis postoperatively, such that the risk is greater in patients who undergo vertical sleeve gastrectomy vs Roux-en-Y gastric bypass surgery, according to a study. Risk factors include younger age and presence of gallstones.
6 days ago
Elderly adults using hypoglycaemic glucose-lowering drugs, such as insulin and glinides, have an excess risk of hospitalization for serious trauma, a recent study has found.
6 days ago
Rather than the presence or type or urinary incontinence, increasing severity of urinary incontinence correlates with increased depression, anxiety and stress among treatment-seeking women with lower urinary tract symptoms (LUTS), suggests a study.
Roshini Claire Anthony, 4 days ago

Overweight or obese patients taking lorcaserin as an appetite suppressant may have the added benefit of a reduced risk of incident diabetes, according to results of the CAMELLIA-TIMI 61* trial presented at EASD 2018.

Men more sensitive to blue light

11 Nov 2017
The cornea, the transparent outermost layer of the eye, protects the eye from infection and physical injury.

Sensitivity to blue-enriched light is influenced by sex differences, such that males display a stronger response even to very low light levels, a recent study suggests. Moreover, sex differences also affect the acute benefits of bedtime blue light exposure such as sustained attention.

In the study, 32 participants (mean age 25.2±3.1 years; 50 percent female) were subjected to 1.5 hours of dim light (<8 lx), 2 hours of darkness, 2 hours of light exposure (40 lx) and 45 minutes of dim light (<8 lx), in sequence, until habitual sleep time. Both groups were matched according to age, ethnicity and body mass index.

Males preferred the 40-lx light delivered by a 6,500-K than by a 2,500-K fluorescent lamp (62.5 vs 37.5 percent). An opposite trend was observed for females (12.5 vs 87.5 percent, respectively), with the difference between the sexes reaching significance (p=0.004).

In a posthoc analysis, males were found to perceive the 6,500-K light as significantly stronger than the 2,500-K light (mean, 85.6±4.5 vs 67.7±5.4).

Light condition, specifically the 6,500-K light, significantly improved the median response time (p<0.005) and 10-percent fastest response time (p<0.001) exclusively in males. No such effect was observed in females.

Moreover, following exposure to 6,500-K light before bedtime, males had significantly higher frontal nonrapid eye movement slow-wave activity (2 to 4 Hz) sleep electroencephalogram power density than women (p<0.05).

“Collectively, the data indicate that sex differences in light sensitivity might play a key role for ensuring the success of individually-targeted light interventions,” said researchers.

Digital Edition
Asia's trusted medical magazine for healthcare professionals. Get your MIMS Doctor - Malaysia digital copy today!
Sign In To Download
Editor's Recommendations
Most Read Articles
2 days ago
The types of bariatric surgery differentially affect the risk of developing acute pancreatitis postoperatively, such that the risk is greater in patients who undergo vertical sleeve gastrectomy vs Roux-en-Y gastric bypass surgery, according to a study. Risk factors include younger age and presence of gallstones.
6 days ago
Elderly adults using hypoglycaemic glucose-lowering drugs, such as insulin and glinides, have an excess risk of hospitalization for serious trauma, a recent study has found.
6 days ago
Rather than the presence or type or urinary incontinence, increasing severity of urinary incontinence correlates with increased depression, anxiety and stress among treatment-seeking women with lower urinary tract symptoms (LUTS), suggests a study.
Roshini Claire Anthony, 4 days ago

Overweight or obese patients taking lorcaserin as an appetite suppressant may have the added benefit of a reduced risk of incident diabetes, according to results of the CAMELLIA-TIMI 61* trial presented at EASD 2018.