According to the "ScienceDaily" report, there are currently about 12 million seniors in the UK. Within 50 years, the number may increase to 20 million, and these people are likely to have vision loss due to retinal aging. Glen Jeffery, the lead author of the study and a professor at the Institute of Ophthalmology at University College London, said: "As we grow older, vision will begin to decline, especially after the age of 40."
It is reported that the photoreceptor cells in the retina begin to age when humans are around 40 years old. And due to the highest density of mitochondria in the photoreceptor cells of the retina, the energy required is very high, so the retinal aging rate is usually faster.
Based on their previous studies in mice, bees, and fruit flies, the researchers found that when their eyes were exposed to deep red light at a wavelength of 670 nanometers, the function of retinal photoreceptor cells was significantly improved. Jeffrey pointed out that mitochondria can be affected by specific light. For example, when the wavelength of light is between 650 nm and 1000 nm, the performance of mitochondria can be improved and the energy output can be increased.
In order to test whether the above results can be applied to humans, the researchers found 24 participants (12 males, 12 females) aged between 28 and 72 years, and no eye-related diseases; before the study began, the study The personnel tested the sensitivity of rod cells and vertebral cells, that is, photoreceptor cells, for all participants.
Next, all participants were asked to take an LED flashlight home and watch the 670 nm deep red light emitted by the LED flashlight for 3 minutes every day, and after 2 weeks, re-test the sensitivity of the photoreceptor cells.
It was found that although the deep red light of 670 nanometer wavelength has no effect on young participants, it was significantly improved in people around 40 years of age and above. The sensitivity of some human visual vertebral cells (with the ability to detect color) was Even increased by 20%. In addition, the sensitivity of rod cells has also been improved.
Jeffrey said that research has confirmed that if the eyes are briefly exposed to light of a specific wavelength, it is like charging the battery, which can significantly improve the debilitating vision of the elderly. (Source: Free Times)