Ophthalmology

A bit of dark chocolate might sweeten your vision

It may not replace prescription glasses, but a few bites of dark chocolate might offer a slight and temporary bump up in vision quality, new research suggests.

Diabetes

Magnesium cuts diabetes risk

Getting enough magnesium in the diet may reduce the risk of diabetes, especially for those who already show signs of heading that way.

Psychology & Psychiatry

Psychologists define the 'dark core of personality'

Egoism, Machiavellianism, narcissism, psychopathy, sadism, spitefulness and others are among the traits of the malevolent side of human personality. As results from a recently published German-Danish research project show, ...

Ophthalmology

What are eye floaters?

Spots, flashes of light or darkness on any side of your vision could be a sign of eye floaters. Most often noticeable when looking at a plain, bright background, such as a blue sky or a white wall, eye floaters are a symptom ...

Cardiology

Eating almonds and dark chocolate lowers bad cholesterol

Eating nearly one-third a cup of almonds a day—either alone or combined with almost one-quarter cup of dark chocolate and 2 1/3 tablespoons of cocoa a day—may reduce a risk factor for coronary heart disease, according ...

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Darkness

Darkness, in contrast with brightness, is a relative absence of visible light. It is the appearance of black in a color space. When light is not present, rod and cone cells within the eye are not stimulated. This lack of stimulation means photoreceptor cells are unable to distinguish color frequency and wavelength. The resulting perception is achromatic and in the case of darkness, black. The emotional reaction to darkness has metaphorical importance in many cultures.

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