Julianna
Miami, FL
“I spend long hours in front of a computer, so I always keep these eye drops with me. The formula feels very soothing, and they quickly help relieve the dryness and discomfort I get after staring at a screen all day.”
Lubricating Eye Drops
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“Moisture Oyster checks several important boxes for me: a protected multidose bottle, easy dispensing, immediate comfort, and no blurry vision after instillation. It made a great first impression.”
“Moisture Oyster checks several important boxes for me: a protected multidose bottle, easy dispensing, immediate comfort, and no blurry vision after instillation. It made a great first impression.”
ABOUT Moisture Oyster
Built for eyes
that never get a break
Screens cut your blink rate dramatically, starving the ocular surface of moisture. Air conditioning, travel, long working days and nights.
55%
Graefe's Archive for Clinical & Experimental Ophthalmology, 2021 45–55% across digital displays.
HOW WE COMPARE
Not all eye drops
are equal
| FEATURE |
|
TYPICAL OTC DROPS |
|---|---|---|
| Preservative-free | Preservative-free via the Aptar OSD (Ophthalmic Squeeze Dispenser); one-way-valve technology prevents contamination without chemical preservatives. FDA-cleared. | |
| DUAL HYDRATION AGENTS | Triple-action hydration: Glycerin (immediate lubrication) + Sodium Hyaluronate (sustained mucomimetic film) + L-Carnitine (osmoprotection). | Most OTC drops contain a single lubricating agent, typically carboxymethylcellulose or polyethylene glycol. |
| L-Carnitine Cell Support | ||
| pH Matched to Natural Tears | Many OTC drops are not pH-optimised to natural tear chemistry (~7.4–7.5), which can cause transient stinging on application. | |
| Won't Blur Vision | Commonly contains HPMC, carbomer, or CMC — viscosity-enhancing agents associated with post-application blur. | |
| Designed for Daily Use | Formulated with benzalkonium chloride (BAK) or other preservatives that limit safe daily frequency with prolonged use. | |
| Made for Digital-Age Eyes | General-purpose formula — not engineered for the hyperosmolar, low-blink-rate environment created by extended screen use. |
WHAT'S INSIDE
What's in your
drops
ACTIVE
Glycerin
Eye lubricant- FDA OTC monograph demulcent per 21 CFR 349.12.
Clinically effective within the 0.2–1.0% monograph range. Low enough for sensitive eyes, high enough for immediate relief.
INACTIVE
Sodium Hyaluronate0.25%
Long-acting mucomimetic lubricant; binds up to 1,000× its weight in water.
It clings to the eye longer than standard watery drops, and the right molecular weight means no blurry first blink.
Occurs naturally in tears — the same lubricating molecule your eyes make.
L-Carnitine0.25%
Osmoprotectant — stabilises corneal epithelial cells under hyperosmolar stress (dry eye, screen use, air travel)
Laboratory studies of L-carnitine, an osmoprotectant, show it helps corneal cells tolerate hyperosmolar (dry-eye) stress.
Balanced Saline
Isotonic carrier matched to natural tears at 272 mOsm/kg
Borate Buffer
Stabilizes the formula at physiologic tear pH (~7.5)
FREE FROM
No BAK
Found in many OTC drops, BAK is associated with corneal toxicity with repeated daily use. Moisture Oyster is BAK-free.
No Preservatives
Preservative-free multi-dose bottle via the Aptar OSD- a one-way valve that prevents bacterial contamination without chemical preservatives.
No Artificial Thickeners
No HPMC or carbomer thickeners that cause post-application blur.
No Artificial Colorants
Clear, pure formula.
SPECS
~7.5
272 mOsm/kg
0
10 mL (~200 drops)
24 months
cGMP 21 CFR 210/211
Non-irritant (OECD TG 492B, GLP)
THE SCIENCE
Engineered for tear-film support.
GLP-tested as a non-irritant.
0.25%SODIUM HYALURONATE
Disclosed, clinically meaningful concentration for a stable ocular film.
0.25%L-CARNITINE
Osmoprotectant that helps corneal cells tolerate hyperosmolar (dry-eye) stress.
272MOSM/KG
Isotonic, matched to healthy human tears.
7.5PH
Buffered to physiologic tear pH — no sting.
INDEPENDENT GLP TESTING
GLP Non-Irritant
Tissue viability at 5 / 16 / 120-minute exposures, far above the 50% irritation threshold.
50% IRRITATION THRESHOLD
| Exposure | Tissue viability |
|---|---|
| 5 MINEXPOSURE | 97.6% |
| 16 MINEXPOSURE | 93.8% |
| 120 MINEXPOSURE | 96.2% |
Reconstructed human cornea · Tissue viability
No UN GHS Eye Irritation CategoryVIDEO REVIEW
Doctors
recommendation
As an eye doctor, the first thing I noticed was the bottle design. The one-way valve helps protect the solution from contamination, the drop dispenses easily, it feels great on the eye, and it doesn't blur vision. That's exactly what I want to see.
Charity
Los Angeles, CA
“From the first time I used Moisture Oyster, my eyes felt so much better. I’d been relying on Lumify for a long time because my eyes were always red, but after using these drops, I found myself reaching for Lumify less and less. I also love that they don’t sting or burn like Systane does for me. I had tried BioTears before, but it just didn’t feel as moisturizing. These are honestly the best eye drops I’ve used.”
Polina
Irvine, CA
“The other night I was watching TV really late, and my eyes started stinging. Like I always do, I reached for my boyfriend’s contact lens solution (odd, I know but it’s just saline!) but I kept putting it in my eyes and it really wasn’t helping. Then I remembered I had Moisture Oyster on my desk, and after just one drop, my eyes felt so much better. I haven’t reached for the contact solution since. Don’t judge me!”
Can I use Moisture Oyster with contact lenses?
It is not a rewetting drop, so don't apply it while wearing your contact lenses. Otherwise, yes. Use it before inserting your lenses and after removing them.
How does the preservative-free, multi-dose bottle work?
Our bottle uses the Aptar OSD (Ophthalmic Squeeze Dispenser). A one-way valve system that keeps every drop sterile without chemical preservatives, roughly 200 drops per bottle.
Will my subscription price ever increase?
Your price is locked in at sign-up. We never increase subscription prices without 30 days' notice and an opt-out window.
What if I forget a delivery is coming?
You can skip, delay, or adjust before it ships.
What if I use it up too slowly?
Switch to 60-day delivery from your account dashboard. Change frequency anytime, no fees.
How do I pause or cancel?
Just one click in your account dashboard. No forms, no phone calls.
Is Moisture Oyster safe for daily use?
Yes. BAK-free, preservative-free, and independently tested as a non-irritant under OECD TG 492B. Follow the directions on the Drug Facts panel.
Where is Moisture Oyster made?
Manufactured in the Netherlands by Oté Pharma SOL B.V. according to US FDA 21 CFR 210 & 211 cGMP standards.
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