Enhance Vision in 3 Minutes with Dim Red Light

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Ngày cập nhật gần nhất: 1/10/2025

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Retina's Photoreceptor

Timing Matters

A study from researchers at University College London, United Kingdom, reveals the potential of a certain type of light to improve declining vision.

The study indicates that 3 minutes of exposure to dim red light in the morning once a week can improve vision deteriorated due to aging, within a maximum of one week.

Researchers commenced trials with flies and mice before progressing to human participants. Leading the research, Professor Glen Jeffery stated: 'Regardless of the species, to some extent, light will impact cells.'

The deep red light utilized by researchers is a specific hue, with a wavelength of 670 nanometers. The study was published in the journal Scientific Reports.

Retina's Photoreceptor

Professor Jeffery elucidated that the visual improvement discovered in the research stems from the fact that 'the light we use influences the photoreceptor.' He explained: 'These are energy sources preserved within cells - akin to a cell's battery. Light enlarges the area of the photoreceptors, allowing them to regain energy depleted due to aging or illness.' The chemical origin of that energy is adenosine triphosphate (ATP).

Visual decline occurs after the age of 40 and is correlated with a 70% reduction in ATP, indicating cells lack energy to function normally.

'There's something marvelous about the retina in that it has more photoreceptors than any other organ because it utilizes a great deal of energy. Most importantly, you can easily access optics by directly shining light onto the retinal photoreceptors, something you can't do with those in the liver or kidney. Furthermore, the fact that the retina ages faster than any other organ means you can simply assess its function by asking others what they see, enabling you to set targets for red light therapy,' shared the professor.

The color contrast vision of individuals exposed to red light in the morning improved on average by 17%.

Timing Matters

Researchers point out that exposure to red light must occur in the morning to be effective.

They found no improvement in color contrast vision in participants exposed to light in the evening.

The reason could be that photoreceptors adhere to the body's circadian rhythm, and as Professor Jeffery stated: 'They might be busy doing other things in the evening.'

Research also indicates that 3 minutes is the optimal duration for exposure to red light, and vision improvement extends up to a week.

According to Medical News Today

Frequently Asked Questions

How can dim red light exposure improve declining vision in individuals?

Dim red light exposure, specifically at a wavelength of 670 nanometers, can enhance declining vision by energizing photoreceptors in the retina. This process allows cells to regain lost energy, improving overall visual function.

What is the optimal duration for red light exposure to achieve vision improvement?

The optimal duration for red light exposure to enhance vision is 3 minutes. This brief exposure, done once a week in the morning, has been shown to produce significant improvements in color contrast vision.

Does the timing of red light exposure affect its effectiveness for vision improvement?

Yes, the timing of red light exposure is crucial for its effectiveness. Morning exposure leads to improved vision, while evening exposure shows no significant benefit due to the body's circadian rhythms affecting photoreceptor activity.

What was the method used in the study to test the effects of red light on vision?

The study began with trials on flies and mice before involving human participants. Researchers measured the improvement in color contrast vision after subjects were exposed to dim red light under controlled conditions.

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