![How does the eye switch from photopic to mesopic vision? Is this switch related to any sleep/circadian responses? : r/askscience How does the eye switch from photopic to mesopic vision? Is this switch related to any sleep/circadian responses? : r/askscience](https://external-preview.redd.it/l9NARrOeqsjl01w9MCE_kvHXBTb5D1LE-0HXfjgCNK0.png?width=640&crop=smart&auto=webp&s=ce1cd141bd5c621751315da36bd1d1b1525bdf60)
How does the eye switch from photopic to mesopic vision? Is this switch related to any sleep/circadian responses? : r/askscience
![Jose Luis Vega on Twitter: "when the sun's UV rays are absorbed into our eyes, they stimulate the production of dopamine, melatonin, and serotonin, all of which are essential for healthy brain Jose Luis Vega on Twitter: "when the sun's UV rays are absorbed into our eyes, they stimulate the production of dopamine, melatonin, and serotonin, all of which are essential for healthy brain](https://pbs.twimg.com/media/FGZnDfHWUAUN6ds.jpg)
Jose Luis Vega on Twitter: "when the sun's UV rays are absorbed into our eyes, they stimulate the production of dopamine, melatonin, and serotonin, all of which are essential for healthy brain
![Amazon.com: Sun Coast Sciences BioLuna - Calm Sleep and Mood Support Supplement with L-Theanine, Ashwagandha Extract, Melatonin, Lemon Balm, GABA - 60 Veggie Capsules : Health & Household Amazon.com: Sun Coast Sciences BioLuna - Calm Sleep and Mood Support Supplement with L-Theanine, Ashwagandha Extract, Melatonin, Lemon Balm, GABA - 60 Veggie Capsules : Health & Household](https://m.media-amazon.com/images/I/611mNatW8IL.jpg)
Amazon.com: Sun Coast Sciences BioLuna - Calm Sleep and Mood Support Supplement with L-Theanine, Ashwagandha Extract, Melatonin, Lemon Balm, GABA - 60 Veggie Capsules : Health & Household
![Nutrients | Free Full-Text | Is Melatonin the “Next Vitamin D”?: A Review of Emerging Science, Clinical Uses, Safety, and Dietary Supplements Nutrients | Free Full-Text | Is Melatonin the “Next Vitamin D”?: A Review of Emerging Science, Clinical Uses, Safety, and Dietary Supplements](https://www.mdpi.com/nutrients/nutrients-14-03934/article_deploy/html/images/nutrients-14-03934-ag.png)
Nutrients | Free Full-Text | Is Melatonin the “Next Vitamin D”?: A Review of Emerging Science, Clinical Uses, Safety, and Dietary Supplements
Dr Steven Lin - We are creatures dependent on the sun, as humans are programmed to be outdoors while the sun is shining and home in bed at night. The brain uses
Dr. Michelle Jeffries - The benefits of melatonin for your skin are varied and may be especially helpful if you spend time in the sun or around environmental pollutants or are starting
![Exposure Sunlight Increase Serotonin Pineal Gland Stock Vector (Royalty Free) 360063584 | Shutterstock Exposure Sunlight Increase Serotonin Pineal Gland Stock Vector (Royalty Free) 360063584 | Shutterstock](https://www.shutterstock.com/shutterstock/photos/360063584/display_1500/stock-vector-exposure-to-sunlight-increase-the-serotonin-the-pineal-gland-starts-the-synthesis-of-melatonin-360063584.jpg)
Exposure Sunlight Increase Serotonin Pineal Gland Stock Vector (Royalty Free) 360063584 | Shutterstock
![The circadian rhythm and sleep-wake cycle: how exposure to sunlight regulates melatonin secretion in the human brain and body processes Stock Vector Image & Art - Alamy The circadian rhythm and sleep-wake cycle: how exposure to sunlight regulates melatonin secretion in the human brain and body processes Stock Vector Image & Art - Alamy](https://c8.alamy.com/comp/2BTNXM3/the-circadian-rhythm-and-sleep-wake-cycle-how-exposure-to-sunlight-regulates-melatonin-secretion-in-the-human-brain-and-body-processes-2BTNXM3.jpg)
The circadian rhythm and sleep-wake cycle: how exposure to sunlight regulates melatonin secretion in the human brain and body processes Stock Vector Image & Art - Alamy
![Relationship between Sleep Duration, Sun Exposure, and Serum 25-Hydroxyvitamin D Status: A Cross-sectional Study | Scientific Reports Relationship between Sleep Duration, Sun Exposure, and Serum 25-Hydroxyvitamin D Status: A Cross-sectional Study | Scientific Reports](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-020-61061-8/MediaObjects/41598_2020_61061_Fig1_HTML.png)
Relationship between Sleep Duration, Sun Exposure, and Serum 25-Hydroxyvitamin D Status: A Cross-sectional Study | Scientific Reports
![The circadian rhythm and sleep-wake cycle: how exposure to sunlight regulates melatonin secretion and body processes during day and night Stock Vector Image & Art - Alamy The circadian rhythm and sleep-wake cycle: how exposure to sunlight regulates melatonin secretion and body processes during day and night Stock Vector Image & Art - Alamy](https://c8.alamy.com/comp/2BTNXE2/the-circadian-rhythm-and-sleep-wake-cycle-how-exposure-to-sunlight-regulates-melatonin-secretion-and-body-processes-during-day-and-night-2BTNXE2.jpg)