Maximize tear production by supporting both your lacrimal and vagus nerves*

Patented Parasym Plus Eyes™ is the only compound scientifically proven to nudge the lacrimal and vagus nerves to safely support normal tear production.*

Lacrimal Nerves                |                  Vagus Nerve

Invented by Dr. Diana Driscoll, Optometrist, a researcher of the parasympathetic nervous system.

Bottle of parasym plus eyes

Groundbreaking Science

Never before has tear production been viewed as a localized manifestation of systemic (body-wide) health!

Support normal tear production by supporting autonomic health.

Parasym Plus Eyes™

Our Tears

Ocular tears do more than just provide moisture! They play an important role in protecting the eye from infection, they allow a smooth, clear surface for good vision, and they continually nourish the ocular surface.

To help maintain ocular health, tears contain over 2,000 different molecules, including over 1,500 proteins as well as growth factors, lipids, antioxidants, mucins, electrolytes, and enzymes.

Artificial tears cannot be a substitute for natural tears.

We must maximize the ability to produce our own, natural tears while controlling inflammation.

In The News!

review of optometry logo

Fifteen years ago, I would never have guessed that I would be thrown deeply into the study of the autonomic nervous system. My story is an unusual one that began with a dramatic, disabling illness that robbed me of my ability to practice optometry, the profession that…

Read more

healio optometry news

Not surprisingly, most eye care specialists see dry eye disease as an ocular problem. But what would our treatment strategies look like if we instead approached it as a local manifestation of a systemic problem?

Read more

optometric management logo

We are fortunate to have numerous interventions designed to address the ocular symptoms and local inflammatory component of chronic dry eye disease (DED), but treatment options for the neurological control of tear production have been lacking. Tear production is an…

Read more


Listen to the podcast today to hear:

  • How Dr. Diana Driscoll, Optometrist, identifies patients that may be experiencing vagus nerve disruption and what doctors should know about Parasym Plus Eyes
  • An in-depth discussion on the connection between immunity, neurology, and dry eye disease
  • And more!

This Works Via Two Mechanisms

The Lacrimal Nerves

Tear production is under tight neural control and is a complicated neurological process. The parasympathetic nervous system is the major pathway for tear production. It works via stimulation of the lacrimal gland by the parasympathetic lacrimal nerves.

The lacrimal nerves communicate with the lacrimal gland to produce tears as needed. The nerves release a neurotransmitter (acetylcholine) that then lands on receptors in the lacrimal glands. This signals the glands to produce tears.

Parasym Plus Eyes™ works by supporting acetylcholine — the neurotransmitter needed for tear production.

An infographic showing the nervous system of the body, and how you can benefit from parasym plus eyes

The Vagus Nerve

By maximizing acetylcholine, Parasym Plus Eyes™ also supports the vagus nerve. Your vagus nerve is the anti-inflammatory nerve of the body. Normal inflammation is important for healthy and comfortable eyes!

What does the vagus nerve do?

  • The vagus nerve controls inflammation. This nerve also:
  • Allows normal digestion and bowel movements
  • Triggers normal stomach acid production
  • Communicates with the gallbladder to release bile
  • Communicates with the pancreas to release digestive enzymes
  • Slows heart rate and breathing when relaxation is appropriate


The vagus nerve and its effects in the body. Parasym plus eyes can support the vagus nerve

Vagus Nerve Function & the Parasympathetic Nervous System

From the Inventor

“The production of tears is under control of the autonomic nervous system – specifically, the parasympathetic nervous system. Never before has tear production been addressed neurologically with a supplement blend! By simultaneously supporting both the lacrimal nerves (for tear production) and the vagus nerve (for normal inflammation control) tear production is maximized. This approach is unique, patented, and a necessary step for normal tears for many.”

Dr. Diana Driscoll, Optometrist, inventor of Parasym Plus Eyes

Diana Driscoll OD, Inventor

Parasym Plus Eyes™ is the only compound patented to simultaneously support both:

The Vagus Nerve (the nerve that controls inflammation)

The Lacrimal Nerves (the nerves that stimulate tear production)


In the past, tear production was seen as an ocular function only.

When viewed as just one aspect of body-wide autonomic function, supporting tear production changes dramatically.

Support autonomic health for normal tear production and overall wellness.

What interferes with the release of acetylcholine?

Aging, nerve damage, and inflammation all negatively affect the release of acetylcholine and ultimately result in dry eyes. Parasym Plus Eyes™ is patented to work around all of these issues by directly affecting the receptors – it does not depend upon a functioning nerve.

Support Your Natural Tears Neurologically

Do you need to stimulate your lacrimal or vagus nerves? NO! These nerves are autonomic — this means they work automatically. Then how does this work?

  • Your lacrimal nerves stimulate tear production.
  • Your vagus nerve controls inflammation.
  • To support these nerves, support the neurotransmitter, acetylcholine.
  • By supporting the neurotransmitter, there is no reliance on a functioning nerve.
  • If the lacrimal or vagus nerves are damaged for any reason, tear production can still occur.
  • The neurotransmitter works via the receptors, not the nerve itself.
  • Natural tear production is supported neurologically.


“For years literally I have suffered with dry, inflamed, red irritated eyes. It’s amazing after 30 years of chronic eye problems, multiple specialist appts, lots of eye medications, I’m so much better.”

Joanie H.

“I couldn’t believe I got so caught up with work and life and forgot to get my Parasym Plus! Big mistake! My eyes were a mess mornings waking up with wetness and eye crud!!! It was overwhelming! Then I thought I hadn’t taken my Parasym Plus! Folks this stuff is magic in a bottle! Don’t be without it!!!”

Steve S.

“My dry eyes feel a lot better after only a few weeks!

I can’t wait to see long term what the product will do!!! I am impressed !!!”

Caroline F.

“I had dry eyes and after taking Parasym Plus the doctor said my eyes were hardly dry anymore!”

Pami G.

“We’ve seen a decrease in dry eyes, a decrease in fatigue, a decrease in our heart rates, and a decrease in brain fog. This supplement has helped us so much.”

Tracy H.

“Wow! What a difference! No more dry eyes or dry mouth. It helps my cognition, my gut, and my emotions. This one is worth it!”

Helen J.

parasym plus eyes supplement facts

Safe and Gentle Ingredients to Support Normal Tear Production Levels*

A proprietary blend scientifically proven to support normal tear production – with additional nutrients to support eye health.


Parasym Plus Eyes™

The only supplement designed to support your lacrimal and vagus nerves to support normal tear production.*

a bottle of parasym plus eyes


Seifert P, Spitznas M. Demonstration of nerve fibers in human accessory lacrimal glands. Graefes Arch Clin Exp Ophthalmol. 1994;232(2):107-114. doi:10.1007/BF00171672

LeDoux MS, Zhou Q, Murphy RB, Greene ML, Ryan P. Parasympathetic innervation of the meibomian glands in rats. Invest Ophthalmol Vis Sci. 2001;42(11):2434-2441.

Mitchelson F. Muscarinic receptor agonists and antagonists: effects on ocular function. Handb Exp Pharmacol. 2012;(208):263-298. doi:10.1007/978-3-642-23274-9_12

Dartt DA. Neural regulation of lacrimal gland secretory processes: relevance in dry eye diseases. Prog Retin Eye Res. 2009;28(3):155-177. doi:10.1016/j.preteyeres.2009.04.003

Agrón E, Mares J, Clemons TE, et al. Dietary Nutrient Intake and Progression to Late Age-Related Macular Degeneration in the Age-Related Eye Disease Studies 1 and 2. Ophthalmology. 2021;128(3):425-442. doi:10.1016/j.ophtha.2020.08.018

Ibuki M, Lee D, Shinojima A, Miwa Y, Tsubota K, Kurihara T. Rice Bran and Vitamin B6 Suppress Pathological Neovascularization in a Murine Model of Age-Related Macular Degeneration as Novel HIF Inhibitors. Int J Mol Sci. 2020;21(23):8940. Published 2020 Nov 25. doi:10.3390/ijms21238940

Venkataswamy G. Ocular manifestations of vitamin B-complex deficiency. Br J Ophthalmol. 1967;51(11):749-754. doi:10.1136/bjo.51.11.749

Radomska-Leśniewska DM, Osiecka-Iwan A, Hyc A, Góźdź A, Dąbrowska AM, Skopiński P. Therapeutic potential of curcumin in eye diseases. Cent Eur J Immunol. 2019;44(2):181-189. doi:10.5114/ceji.2019.87070

Liu XF, Hao JL, Xie T, et al. Curcumin, A Potential Therapeutic Candidate for Anterior Segment Eye Diseases: A Review. Front Pharmacol. 2017;8:66. Published 2017 Feb 14. doi:10.3389/fphar.2017.00066

Li LH, Lee JC, Leung HH, Lam WC, Fu Z, Lo ACY. Lutein Supplementation for Eye Diseases. Nutrients. 2020;12(6):1721. Published 2020 Jun 9. doi:10.3390/nu12061721

Mares J. Lutein and Zeaxanthin Isomers in Eye Health and Disease. Annu Rev Nutr. 2016;36:571-602. doi:10.1146/annurev-nutr-071715-051110

Buscemi S, Corleo D, Di Pace F, Petroni ML, Satriano A, Marchesini G. The Effect of Lutein on Eye and Extra-Eye Health. Nutrients. 2018;10(9):1321. Published 2018 Sep 18. doi:10.3390/nu10091321

Mitchelson F. Muscarinic receptor agonists and antagonists: effects on ocular function. Handb Exp Pharmacol. 2012;(208):263-298. doi:10.1007/978-3-642-23274-9_12

Khoo HE, Ng HS, Yap WS, Goh HJH, Yim HS. Nutrients for Prevention of Macular Degeneration and Eye-Related Diseases. Antioxidants (Basel). 2019;8(4):85. Published 2019 Apr 2. doi:10.3390/antiox8040085

Pavlov VA, Tracey KJ. The vagus nerve and the inflammatory reflex–linking immunity and metabolism. Nat Rev Endocrinol. 2012;8(12):743-754. doi:10.1038/nrendo.2012.189