FAQs

Many store-bought omega-3s are in a synthetic (ester) or unpurified form, which is difficult to absorb and leaves a fishy odor/aftertaste. PRN Omega-3s are in an ultra-purified triglyceride (rTG) form, which is a similar form to a piece of fish, but without the impurities. This form is easier for your body to absorb and micro-distilled to remove contaminants like PCBs, lead, mercury and more. PRN omega-3s are manufactured in a NSF®️ and cGMP facility.

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PRN Omega-3s are tested and safe. Commonly reported side effects of omega-3 supplements are usually mild. These could include unpleasant taste, bad breath, heartburn, nausea, gastrointestinal discomfort, diarrhea, headache, and odoriferous sweat. In addition, Omega-3 dietary supplements, such as fish oil, have the potential to interact with medications such as Warfarin and other blood-thinning medications. People taking these and other medications on a regular basis should discuss possible interactions with their healthcare providers.

The American Heart Association and the American Cardiology Association recommend 2-3 grams of omega-3s daily (EPA+DHA).* To get this amount of Omega 3s (generally equal to 3 soft gels of PRN Omega 3s daily) from eating fish, you would have to consume the equivalent of 37 cans of tuna per week! Eating this much fish could result in an increased risk for mercury poisoning. Other fish that can be purchased in stores are mostly farm-raised which have little Omega-3s, or wild-caught, which are optimal but have an increased risk of being contaminated with harmful PCBs, dioxins, mercury, etc.

Flaxseed contains the plant source of Omega-3s, also known as alpha-linolenic acid (ALA). This form is less easy to absorb and less effective in the body. Marine-based Omega-3s have been shown to be more absorbable which may provide systemic benefits.*

Bodyweight does not have a direct correlation with Omega-3 saturation. These Omega-3s are in a purified triglyceride form — the same form you ingest when you eat fish. The amount of omega-6s within your diet is the competing factor for Omega-3 saturation.

Our home delivery program allows you to receive a 3,6 or 12 month supply per shipment for each of our products. You choose your recurring frequency to ensure that you never run out of the product. Our warehouse has a 24-48 hr window to fill orders, but orders most often ship within 24 hours. You retain complete control and can change or cancel at any time by calling us at 844-776-4968. PLEASE NOTE: Orders placed on Friday, Sat or Sunday will not ship out until Monday. UPS expedited shipping is counted in business days and does not include weekend days.

When you enroll in our home delivery program, you will receive free shipping and handling on all of your orders within the United States.

PRN Vision Group is committed to your safety and satisfaction. We believe you will like PRN products. If a problem occurs or you experience any issues with a PRN product you purchased through our website, call us at 800-900-2303 or email us at info@prnvision.com for a full refund within 30 days of purchase (excludes repeat orders).

• In order to be eligible for a refund on your purchased goods, you're required to return the products at your own expense.
• Our return policy allows for refunds on any product, but only the first time you order it. Please note, this refund is only valid if the request is made within 30 days of your purchase. Unfortunately, repeat orders of the same product cannot be refunded.
  All orders undergo a quality assurance review before shipping, but in the event an error occurs, PRN is committed to correcting it. To report any error, contact PRN’s Customer Relations Department at 800-900-2303.

If you receive a damaged product, please get in touch with PRN’s Customer Relations Department immediately upon receipt of delivery at 800-900-2303. We will provide instructions on how to return the damaged product, and PRN will replace it.

All orders undergo a quality assurance review prior to shipping, but if an error occurs, we are committed to correcting it. If you receive a damaged product, please contact the PRN Customer Relations Department immediately upon receipt of delivery. We will replace any damaged product.

We encourage you to consistently follow your medical provider’s recommendation and dosage instructions. However, adjustments can be made to your future refill shipment(s) by visiting “My Account” on the website. Note that you need to make your change at least three business days prior to your next ship date, which is shown on the front of your packing slip and in the “manage subscription” in your account.

Any order placed before 4:30pm ET will be sent to our warehouse for processing same day. Otherwise, it will be sent the next business day.

No animal testing was conducted. Cliradex was subject to cosmetic safety and efficacy tests before launch. These tests did include Repeated Insult Patch Test (RIPT) on humans and users tested the formulation as a lid wipe. The alternative HETCAM (Hen’s Egg Test Chorioallantoic Membrane) test was performed, so animals did not have to be used.

No, we ship in the USA only, including Puerto Rico, the US Virgin Islands, and APO.

Tea Tree Oil (TTO) used directly on or around the lid-margin of the eye can be rather irritating. Cliradex contains 4-Terpineol, which is a key component of TTO. It has been clinically proven to be the most important ingredient of TTO that kills Demodex mites, yet is safe for everyday use and won’t dry out the skin.

Depending on the severity of your symptoms, your doctor may have different recommendations. For mild-to-moderate symptoms, we recommend using Cliradex once daily for 6-8 weeks. For moderate-to-severe symptoms, we recommend using Cliradex twice daily for 6-8 weeks.

Cliradex Light is a foaming eyelid cleanser designed for everyday ocular hygiene.

At least once a day. Cliradex Light may be used two to three times daily for maximum eye and skin benefit.

• Cliradex towelettes are recommended by doctors for hygiene issues related to Demodex mites and addressing severe ocular irritation.
• Cliradex Light is an everyday ocular hygiene product designed to relieve symptoms of blepharitis and maintain a clean and healthy ocular environment.

Our patented tranquileyes® and tranquileyes® xl systems are the only scientifically proven, natural home treatments on the market that deliver safe, controlled moist-heat for up to 20-25 minutes. The combination of a heat source and water insulated in the thermal plastic goggle is the key to achieving the optimum temperature, humidity and duration proven to provide immediate and long-term relief from symptoms of moderate to severe dry eye, MGD and blepharitis.

Optimum moist-heat therapy has been proven to effectively promote immediate and long-term relief from mild to severe dry eye. The heat loosens critical oils in the Meibomian glands required to slow tear evaporation while the humidity stabilizes tear film and hydrates sensitive eyelids and surrounding skin.

The benefits of D.E.R.M™, tranquileyes® and tranquileyes® XL are cumulative. The results will vary depending on severity. Mild dry eye patients will find immediate relief. Patients with moderate to severe will find immediate relief however long-term relief will require on-going treatments. Dry Eye is a progressive disease. Much like you brush your teeth daily, applying optimum moist-heat regularly is required. Doctors recommend patients with mild dry eye, apply 5 minutes of moist-heat every other day. Moderate to severe patients need to apply moist-heat 10-20 minutes daily to achieve immediate and long-term relief.

Yes. The tranquileyes® goggle is designed for sleep and helps shelter the eyes from air drafts. We recommend using the black foam inserts for sleep. This is why we recommend tranquileyes® for aqueous deficient dry eye patients. They can use the system to create moist-heat therapies and sleep comfortably with the goggles. If you have moderate to severe dry eye and plan to sleep with the tranquileyes®, we recommend soaking the black foam inserts in warm water prior to going to bed for a mild moist-heat therapy. The tranquileyes® xl is 30% larger than the tranquileyes®, resting over the orbital bones. It is a little too large for most people to sleep with comfortably. There is no harm in sleeping with it though if comfortable.

We do not recommend sleeping with thermoeyes™. They are not harmful however they can become uncomfortable after they cool down. Instead, we suggest sleeping with the black foam inserts that come with the tranquileyes® goggle.

The Instants (blue gel packs) contain sodium acetate which is a non-toxic, food-grade salt water. The Beads (green gel packs) contain water, glycerin and sodium polyacrylate, all non-toxic ingredients.

The thermoeyes™ Instants contain sodium acetate. When the metal disc inside the gel pack is clicked back and forth, it creates a sound or frequency, which changes the molecular structure of the sodium acetate from liquid to crystal. This process generates heat. To reuse the gel pack, it needs to be boiled in water for a few minutes (see directions) until the crystals are dissolved.

The Instants need to be in their liquid state to generate heat. First check to see if the metal disc inside the packet is moving around. If it is not, or if you notice any crystals inside the gel pack, you will need to reset the thermoeyes™ Instants by boiling them. If the Instants are in their liquid state and you are unable to activate them, roll the stainless disc to one of the narrow corners of the gel pack. You can hold the gel pack to the light to help you see the disc better. Use two hands and click the metal disc back then forth several times. Continue clicking the disc until the liquid inside the gel pack starts to crystallize. It might take up to 20-30 click the first time you activate them.

Some people experience the feeling of the Beads cooling down too quickly. Don't worry! The gel packs are still working at optimum temperature, but your body is adjusting to the heat. This situation is comparable to getting in a hot tub: after a while your body adjusts to the temperature. You may feel like they are cooling down but it is actually just your body adjusting to the heat, the gel pack is still working.

Yes. The Instants are reusable over 100 times for heat and indefinitely for cold. The Beads are reusable approximately 60 times for heat and can also be used very effectively for cold.

The Instant will stay at optimum temperature for 15-18 minutes when combined with water and tucked inside the tranquileyes® goggle after activation. The Beads will stay at optimum temperature in the same way for 12-15 minutes. Both XL size gel packs stay at optimum temperature for 20-25 minutes inside the goggle with moisture.

We offer four different hydrating nighttime shelters for different face structures: eyeseals™, eyeseals™ 4.0, tranquileyes® and silicone shields Onyix™/Quartz™. Our eyeseals™ and eyeseals™ 4.0 are made of medical grade thermal plastic and rest on top of the orbital bones. We recommend them for nighttime dry eye, lagophthalmos (black), CPAP users with a partial mask (clear), and recurrent corneal erosions. Our tranquileyes® rest on the orbital bones and have viscoelastic foam and foam inserts that can be soaked in water for increased humidity. We recommend them for nighttime dry eye, lagophthalmos, air travel and recurrent corneal erosions. The smallest ones, Onyix™/Quartz™ are made of silicone and rest inside the orbital bones. They are recommended for nighttime dry eye, lagophthalmos (Onyix™), CPAP users with a full mask (Quartz™) and air travel. You can compare how they differ in size on the image below and check specific measures in their product page.

Sleep Mask

Yes, the small frame supports +/-4.0 Rx and the large frame supports +/-3.0 Rx. We sell the eyewear without prescription but they are Rx ready. You can contact your optometrist to get this done, although some labs are not able to do it. If that's the case, contact us for further assistance.

Yes. If you are using the eyewear daily, we suggest replacing out the cartridges every three months or so. There are two sets of cartridges included with the original purchase, and you can find more under Accessories.

The frame contains two removable cartridges. Before wearing, you soak the cartridges in water then return them to the frame. There is a tiny piece of foam inside the cartridge. The frame has rubber gaskets and a bendable bridge which, when worn, seals the space around the eyes. As you wear the eyewear, the moisture from the foam in the cartridge evaporates to create a comfortable environment for your eyes by increasing the relative humidity. This helps to stabilize the tear film, which improves visual acuity and reduces eye fatigue and redness.

Doctor’s Advantage is officially a part of PRN Vision Group!

Doctor’s Advantage and PVG missions align perfectly, providing the best care that your eyes deserve. 

Doctor's Advantage® partners with ophthalmologists and optometrists to provide patients with evidence-based nutriceuticals to support their long-term ocular health.

PRN is a leader in specialty Omega-3 products and nutritional supplements. Our high-quality and effective products are developed in partnership with doctors and supported by a comprehensive body of clinical evidence. PRN Vision Group has partnered with like-minded companies and eye doctors to provide evidence-based nutriceuticals, moist heat masks, and hygienic products to support patients' long-term ocular health.

All Doctor’s Advantage products are shipped using the most cost-effective means for our customers, typically UPS.

Yes, your order can be rush delivered. We use our shipping providers’ real-time rates to calculate the price based on your order specifications.

Most orders are processed and shipped within one business day of being placed.

Currently, we do not accept orders from outside the USA, except for those from Canada and Puerto Rico. All orders must be paid in US dollars.

To protect our customers, Doctor’s Advantage does not allow users to view nor modify their credit card information on our website.

If you need to modify your credit card information, go to the “My Account” website section, log in and you will be able to update your information.