Podcast Summary: The Diary Of A CEO with Steven Bartlett

Episode Title: The No.1 Eye Doctor: They’re Lying To You About Blue Light! The Truth About Floaters! Turn This Phone Setting On To Save Your Eyes!
Guest: Dr. Joseph Allen, Board Certified Optometrist
Date: October 3, 2024

Overview

In this insightful episode, Steven Bartlett sits down with Dr. Joseph Allen, a leading optometrist and prominent educator in eye health. They unravel common myths around topics like blue light, screen usage, eye floaters, under-eye bags, dietary influences, and vision loss, giving actionable advice and science-backed explanations to help listeners care for their vision through all stages of life.

Key Discussion Points and Insights

1. Misconceptions About Eye Health: Bags, Twitching, Blue Light

• Bags Under Eyes:
  • Not always about tiredness; linked to genetics, pigmentation, allergies, sun exposure, and salt intake. Sleeping and hydration help, but not the sole causes.
  • Dark circles and eye bags are different; under-eye bags accentuate dark circles.
  • "Having dark circles under the eyes is technically different than having under eye bags. But if you have under eye bags, it'll make the appearance of dark circles worse." (40:17 – Dr. Allen)
• Eyelid Twitching:
  • Often a sign of stress, fatigue, and excess caffeine; known as myochymia.
  • "Usually not a concern, just get more sleep, stop drinking so much caffeine." (80:32 – Dr. Allen)
• Blue Light Myths:
  • Screen-emitted blue light does not cause eye disease or strain according to research; blue light glasses provide little more than a placebo effect for most people.
  • Sleep cycles can be disrupted by late-night screen use, but blue light isn’t causing physical eye damage.
  • "Blue light that comes from your digital screens has consistently shown in research to not increase the risk of aging eye diseases... it could just be placebo effect." (00:52 and 62:20 – Dr. Allen)
  • Simple fix: Hold devices further away; doubling the distance cuts blue light exposure by 75% (36:12).

2. Epidemic of Nearsightedness & The Role of Lifestyle

• Rising Myopia Rates:
  • Myopia is surging globally, expected to affect 50% of the world population by 2050.
  • Lifestyle—less outdoor time, more screens, focused near-work—are dominant causes, more so than genetics.
  • "By about 2050, we will have about 50% of the entire world's population being nearsighted." (12:16 – Dr. Allen)
• Prevention Tips:
  • For children: 90 minutes to 2 hours daily outdoor time delays myopia onset (18:26).
  • Recommendations: American Academy of Pediatrics advises minimal to no screen time for young kids (16:41).

3. Vision Loss: What’s Inevitable and What’s Preventable

• Age-Related Changes:
  • Conditions like presbyopia, cataracts are normal with aging; everyone will get some lens hardening (presbyopia) and likely cataracts.
  • Cataract surgery is now highly advanced, with lens implants correcting vision.
  • "With older age you're gonna have gray hair... With the eye... age related cataracts eventually will develop presbyopia." (10:54 – Dr. Allen)
• Other Preventable Vision Issues:
  • Cataract risk increased by smoking, alcohol, high sun exposure; use sunglasses and hats.
  • Eye health status can indicate overall health—eye exams detect diabetes, high blood pressure, autoimmune diseases, and sometimes brain tumors.

4. Modern Tools for Eye Health

• iPhone 'Screen Distance' Feature:
  • Warns users if holding device too close; can reduce eye strain, myopia risk in children.
  • Apple’s 2023 update now notifies if held closer than 12 inches (~30 cm).
  • "Just moving your phone back twice as far will decrease your blue light exposure by 75%." (36:12 – Dr. Allen)
  • Can be enabled under Settings > Screen Time > Screen Distance.

5. Diet and Eye Health

• Mediterranean Diet & Oily Fish:
  • Green leafy vegetables (2.7 servings/week) reduce risk of macular degeneration by 25%. Oily fish (2 servings/week) reduces further, and doing both offers up to 41% reduced risk (65:56).
  • "Just eating a Mediterranean diet, green leafy vegetables, oily fish, reduces your risk..." (64:35 – Dr. Allen)
• Omega-3s:
  • Fish/krill/roe help more than standard fish oil supplements, especially for the retina and for people at risk of diabetic retinopathy.
  • Omega-3s can help improve dry eye symptoms (68:38).
• Carrots and Beta Carotene Myth:
  • Carrots help if you’re vitamin A deficient, but the 'see-in-the-dark' narrative was WWII propaganda.

6. Red Light Therapy & Eye Health

• Red Light for Dry Eyes and Macular Degeneration:
  • Evidence in Europe for red light slowing macular degeneration and improving dry eyes, but US FDA has not yet approved.
  • MUST exercise caution with at-home red light devices—non-standardized outputs pose risks (50:58).
  • "If you have too much energy, you can go through the eyelid and go into the eye and cause damage." (49:10 – Dr. Allen)
• Not a Cure for Myopia Yet:
  • Some evidence for use in kids' myopia progression, but not applicable for reversing nearsightedness in adults.

7. Other Eye Concerns

• Floaters:
  • Normal with age; sudden increase, flashes, or shadow require urgent check for retinal detachment.
  • No robust cure; some enzyme/vitamin supplements show promise but evidence is limited (87:10).
  • Pineapple/bromelain anecdote not well-backed by science.
• Diabetes and the Eye:
  • Diabetes is a leading cause of vision loss (retinal bleeding/swelling). Eye exams can be first to detect undiagnosed diabetes (06:19, 76:25).
• Glaucoma:
  • Age-related, typically irreversible nerve damage. Focus is now on lowering eye pressure and finding ways to nourish/strengthen the optic nerve (82:13).

8. Eye Care Habits—What You Should Actually Do

• Regular Eye Exams:
  • "Even if you feel like your vision is great and you see fine, you don't want to lose that." (94:12 – Dr. Allen)
  • Yearly exams can catch 270+ conditions that don’t show early symptoms (05:28).
• Lifestyle:
  • Sleep, hydration, diet, sun protection, and 90–120 minutes outdoors daily for kids. Minimize smoking, excessive alcohol, and high-sugar diets.
• Get the Basics Right:
  • Blinking more when on screens
  • Move screens further away
  • Use sunglasses outdoors
  • Eat green veggies and fish
  • Stay hydrated
  • Manage stress
  • Sleep well

Notable Quotes & Memorable Moments

• "Seeing is useful, but sometimes in life I think we don't appreciate things until we lose them." (05:02 – Steven)
• "There's over 270 different conditions, systemic and vision conditions, that an eye doctor can diagnose from just one of the simplest non invasive medical evaluations, and that's just getting an eye exam every year." (05:44 – Dr. Allen)
• "If you lose your ganglion cells [in glaucoma], they die. You can't get them back." (83:50 – Dr. Allen)
• "Carrots... it was propaganda started in the UK by Great Britain... during WWII, to keep radar a secret." (67:00 – Dr. Allen)
• "One of the biggest things that I personally really like to reflect on...diet and lifestyle, paying attention... have a ripple effect on the eyeball but so many other parts of the body. The eyes are an extension of your brain." (92:45 – Dr. Allen)

Timestamps of Key Segments

• [00:52, 36:12, 62:20]: Blue light myth-busting and practical tips
• [12:16, 15:05]: The global myopia epidemic and its causes
• [16:41, 18:26]: Outdoor time for children to reduce myopia risk
• [40:17, 42:49]: Under-eye bags, dark circles, and their causes
• [50:58]: The pros/cons and risks of red light therapy
• [65:56, 68:38]: Diet, green vegetables, and omega-3s for eye health
• [80:32]: Causes of eyelid twitching (stress, caffeine, sleep)
• [82:13]: Glaucoma explanation
• [87:10]: Eye floaters—what they are and how to address them
• [92:04]: How often to get your eyes tested
• [92:45]: The holistic impact of eye health and lifestyle

Conclusion

Dr. Joseph Allen demystifies eye health, debunks persistent myths, and delivers empowering, actionable guidance. The main takeaways:

• Yearly eye exams matter, even if you think your eyes are “fine.”
• Lifestyle (diet, sleep, time outdoors, device use) impacts your vision and health far more than genetics alone.
• Don’t fall for eye health fads or miracle gadgets—stick to what’s proven by science!
• Invest in your eyes now—they’re your window to learning, connection, and independence.

For more:

• Follow Dr. Allen for eye health tips.
• Check your phone settings for ‘Screen Distance’ to start healthier digital habits.
• Eat leafy greens and oily fish several times weekly!
• BOOK your annual eye exam.

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