Did you know that castor oil is already an ingredient in many over-the-counter eye drop formulations you might be using? Eye dryness and discomfort are common experiences, making this a concern for people of all ages.
While scrolling through TikTok, you’ve probably seen countless videos promoting castor oil as a miracle solution for eye dryness and discomfort. However, ophthalmologists have been warning against blindly following these trends. The truth is, although limited research has shown that formulated eye drops with low concentrations of castor oil mixtures can support moisture and comfort, using it incorrectly can be risky.
Castor oil, which comes from castor beans grown primarily in Western India, South America, and Africa, has long been used for its potential moisturizing properties. Studies have demonstrated that this versatile oil is relatively safe for most people when used appropriately. Throughout this article, we’ll explore the proper methods to use castor oil for eye comfort, examine its benefits, and provide expert-backed guidance to help you maintain hydrated, refreshed-looking eyes.
Eye dryness occurs when your natural protective barrier doesn’t provide enough comfort or hydration.
Why eyes may feel dry or tired
Your tear film consists of three crucial layers: a mucous layer that adheres to the eye, a watery middle layer, and an oily outer layer[1]. When these layers are not balanced, eyes may feel dry, tired, or uncomfortable.
Factors such as age, environment, screen time, or general lifestyle can influence how comfortable your eyes feel.
How oils help reduce tear evaporation
The outermost layer of your tear film consists of oils (lipids). These oils create a protective barrier that helps prevent the watery layer beneath from evaporating too quickly. Without sufficient oil protection, eyes may feel dry or irritated more often.
Where castor oil fits in
Castor oil, rich in ricinoleic acid (comprising 87-90% of the oil), offers unique properties that make it valuable for supporting moisture around the eyes[4]. Its molecular structure includes both hydrophilic and hydrophobic components[4], enabling it to form a stable layer on the eye’s surface.
This distinctive structure allows castor oil to supplement the eye’s natural barrier[5], effectively reducing tear evaporation. Furthermore, its comforting properties[6] make it particularly useful for helping eyes feel soothed and refreshed.
Studies demonstrate that castor oil applied in formulated products has a prolonged presence, helping maintain hydration and comfort for several hours [6].
How Castor Oil Is Used in Eye Care
Castor oil appears in various eye care applications, each offering distinct benefits for different eye-related needs. Let’s explore the specific ways this versatile oil is utilized.
Castor oil in commercial eye drops
Many commercial eye drops contain castor oil as a key ingredient due to its exceptional lubricating properties. These formulations typically feature castor oil in low concentrations, carefully stabilized within an aqueous solution[7]. For instance, brands like Refresh Endura® include a 1.25% castor oil emulsion specifically designed to target all three layers of the tear film[7].
The oil-water emulsions require shaking before application to ensure proper mixing[8]. Once applied, studies show these castor oil-containing drops remain effective in the eyes for at least 4 hours, helping eyes stay comfortable and moisturized[9].
Topical use around the eyelids
Beyond eye drops, castor oil can be applied directly to the eyelids to address specific needs. This approach specifically supports hydration along the lid margins and the delicate skin nearby.
When using castor oil topically:
Choose cold-pressed, organic, or pharmaceutical-grade oil free from additives[10]
Apply using a clean, sterile applicator
Focus on the outer eyelid area
Castor oil under eyes: cosmetic uses
The area beneath the eyes also benefits from castor oil’s moisturizing properties. Its fatty acid composition helps hydrate the delicate under-eye area[11]. Specifically, castor oil functions as a humectant, helping skin maintain moisture for extended periods[12].
For under-eye application, gently massage a small amount using your ring finger in a circular motion[11]. This technique helps the delicate skin under the eyes take in the oil’s moisturizing benefits.
Before using castor oil around the eyes, always conduct a patch test, as some individuals may experience sensitivity or allergic reactions[12].
Expert Advice and Best Practices
Ophthalmologists emphasize careful usage when it comes to castor oil for eye applications. Let’s explore the professional guidance for safely using this product and recognizing when to stop.
How to use castor oil for eyes safely
If you’re considering how to use castor oil for eyes, follow these ophthalmologist-recommended steps:
Wash your hands thoroughly before handling any eye products
If using commercial eye drops containing castor oil, shake the bottle vigorously to mix the oil and water portions
Tilt your head back and gently pull down your lower eyelid
Place one drop in the pocket formed by your lower lid (don’t touch the dropper to your eye)
Close your eyes for 1-2 minutes while applying gentle pressure to your tear ducts
Wipe away any excess with a clean tissue
Proper application timing matters too. Some users apply it several times a day, but always follow product instructions.
For optimal results, never make your own castor oil eye drops, as this creates a risk of contamination[8].
What eye doctors recommend
Eye specialists consistently advise against following TikTok trends promoting pure castor oil applications. “Castor oil on store shelves are not meant to be used on the eyes and could contain dyes, preservatives, fragrances or other ingredients that can cause irritation or infection,” warns the American Academy of Ophthalmology[16].
Instead, doctors recommend using only formulated products containing castor oil. If you’re experiencing ongoing discomfort, consulting an eye care professional is the safest option.
Discontinue castor oil use immediately if you experience:
Persistent blurry vision (beyond a few minutes)
Itchiness or swelling
Increased redness or irritation
These may indicate sensitivity or an allergic reaction. If this occurs, stop use and consult a professional.
Conclusion
Castor oil offers promising support for maintaining moisture and comfort around the eyes when used properly. Throughout this article, we’ve explored how this natural oil works as an ingredient in commercial products to support hydration and enhance eye comfort.
However, safety remains paramount. Above all, remember that commercially formulated products containing castor oil are significantly safer than DIY approaches. Eye care professionals consistently caution against following social media trends promoting pure castor oil applications directly into eyes.
Additionally, the research, while showing potential benefits for supporting healthy-looking eyes, still has considerable limitations. Therefore, consulting with an ophthalmologist before starting any new eye care routine provides the safest path forward. They can recommend appropriate products and application methods tailored to your specific needs.
Finally, pay close attention to how your eyes respond. Discontinue use immediately if you experience any adverse reactions such as persistent blurry vision or increased irritation. After all, maintaining your eye comfort should enhance your quality of life, not compromise it.
Castor oil, when used appropriately and in proper formulations, may help support the appearance of bright, refreshed eyes. Nevertheless, respecting expert guidance and understanding both the benefits and limitations ensures you make informed decisions about incorporating castor oil into your eye care routine.
FAQs
Q1. How should I apply castor oil for eye comfort? Apply commercial eye drops containing castor oil by tilting your head back, gently pulling down your lower eyelid, and placing one drop in the pocket formed. Close your eyes for 1-2 minutes and wipe away any excess with a clean tissue. Use about four times daily for best results.
Q2. Are there any sensitivities to be aware of when using castor oil? Some individuals may notice temporary sensitivity such as mild irritation or blurred vision. If you notice prolonged sensitivity, stop use and consult a professional.
Q3. Can I use castor oil under my eyes for cosmetic purposes? Yes, castor oil can be applied to the delicate under-eye area as a moisturizer. Its fatty acids help hydrate the skin and support moisture retention. Apply a very small amount with your ring finger in gentle circular motions.
Q4. Is it safe to use pure castor oil directly in my eyes? No, it’s not recommended to use pure castor oil directly in your eyes. Ophthalmologists advise against following social media trends promoting this practice. Instead, use only formulated products containing castor oil that are specifically designed for eyes.
Q5. How does castor oil work to support comfort around the eyes? Castor oil helps by supplementing the protective outer layer, which supports hydration and reduces moisture loss, leaving eyes feeling soothed and refreshed.
Hi, I’m Chloe Dubois—organic castor oil evangelist, herbal skincare nerd, and proud owner of far too many dropper bottles. Backed by real research and real-life goop tests, I write fun, fact-checked guides on how this thick miracle oil can boost your brows, lashes, hair, and maybe even your mood (results may vary). Come for the tips, stay for the sass.
