It is a universal phenomenon discovered by scientists at the University of Murcia.
The result is a system failure of accommodation of the eye.
Night myopia was first described in 1942.
If in the dark all cats are gray in the dark, all eyes are myopic. It is a universal phenomenon of the human eye have discovered that scientists at the University of Murcia and explain in the journal PLoS One cause is the failure of the system of accommodation of the eye.
Night myopia is a mystery that “I was head-to astronomers and military since the eighteenth century,” say the authors of this work, after concluding its investigation admit that the impact on vision is less than previously thought, so would not need special glasses or contact lenses to correct it.
Night myopia was so named and first described in 1942 by two Spanish, specialists in optics, José María Otero and Armando Durán, although long before it was of concern to the warring parties of the Second World War.
German, British and Americans locked their sentinels in dark rooms to adapt their eyes at night and could spot the arrival of the enemy. “At one point in history where the magnitude and the procedures to correct nearsightedness night were considered military secrets,” explains to SINC agency one of the authors, Pablo Artal.
However, the phenomenon is known from the late eighteenth century and has interested scientists celebrated as Lord Rayleigh, who acknowledged having learned that “in an almost dark room was clearly shortsighted.”
Techniques used in astronomy
Now, scientists at the University of Murcia have been discovered by a technique used in astronomy that myopia is a universal phenomenon of the human eye during darkness. This phenomenon is due to a mechanism sobreacomodación the lens of the eye in the dark, and would affect equally shortsighted and myopic.
in his laboratory developed an experimental device based on adaptive optics, astronomy technique that eliminates the effect of atmospheric turbulence in the telescope.
With this instrument, infrared light, measured the level of myopia induced by darkness in the eye in different optical conditions, making measurements in eight subjects with normal vision, aged between 24 and 49.
Lacking the technology to perform more accurate measurements, so far believed that this phenomenon undermined the visual acuity in 15%, which produced a myopia of 1.5 diopters (a very significant figure) and it was a possible trigger for many traffic accidents.
In fact, in the 80’s popularized the use of special glasses for night driving to correct visual acuity loss.