Perfluorohexyloctane Eye Drops: Uses, Brands & Dosage

Perfluorohexyloctane is an eye drop medicine used to treat evaporative dry eye and meibomian gland dysfunction by slowing tear evaporation.

Drug class	Lubricant (Water-free)
Type	Single
Forms	Eye Drop
Common strength	100%
Common Indian brands	Miebo / EvoTears (limited availability in India)
Prescription status	Prescription

What Perfluorohexyloctane is used for

Perfluorohexyloctane is an eye medicine primarily used to help people suffering from certain types of dry eye conditions. These conditions can make your eyes feel uncomfortable, gritty, or blurry. Specifically, this medicine is prescribed for:

Evaporative Dry Eye: This is a very common type of dry eye where your tears evaporate too quickly from the surface of your eye. This happens even if your eyes are producing enough tears, because the protective oily layer of the tear film isn’t working properly.
Meibomian Gland Dysfunction (MGD): MGD is a leading cause of evaporative dry eye. The meibomian glands are tiny glands located in your eyelids that produce the oily layer of your tears. When these glands don’t function correctly, they don’t release enough oil, or the oil they release is of poor quality. This leads to tears evaporating too quickly, causing dry eye symptoms.

By addressing these underlying issues, Perfluorohexyloctane aims to improve the comfort and health of your eyes.

How it works

Perfluorohexyloctane works in a unique way to help your eyes stay moist and comfortable. Unlike many traditional eye drops that primarily add water to the tear film, this medicine is a water-free drop. Once instilled into your eye, it spreads to form a very thin, protective layer over your existing tear film. This layer acts like a shield, significantly slowing down the rate at which your natural tears evaporate from the surface of your eye. By reducing tear evaporation, it helps to maintain a more stable and healthy tear film, which in turn reduces the symptoms of dry eye, especially those caused by meibomian gland dysfunction.

How it’s used

Using Perfluorohexyloctane correctly is key to getting the best results and ensuring your eye health. This medicine is an eye drop, and it’s important to follow your ophthalmologist’s instructions precisely.

Typical Dosing:

The usual recommendation is to instill 1 drop into the affected eye(s) 4 times a day.

General Instructions for Instilling Eye Drops:

Wash Your Hands: Always start by washing your hands thoroughly with soap and water. This prevents germs from entering your eye.
Prepare the Bottle: If the bottle has a cap, twist it off carefully. Do not touch the tip of the dropper with your fingers or allow it to touch any surface, as this can contaminate the medicine.
Position Yourself: You can either sit or lie down comfortably. Tilt your head back slightly.
Create a Pouch: Gently pull down your lower eyelid with one finger to create a small pouch.
Instill the Drop: Hold the dropper bottle upside down with your other hand, directly over your eye. Look upwards. Squeeze the bottle gently to release a single drop into the pouch you created.
Close Your Eye: After instilling the drop, close your eye gently for a minute or two. Avoid blinking excessively or squeezing your eyes shut tightly, as this can push the medicine out.
Clean Up: If any medicine spills onto your cheek, wipe it away with a clean tissue.
Replace the Cap: Put the cap back on the bottle immediately after use to keep the medicine sterile.

Important Reminders:

Do Not Touch the Tip: Never touch the tip of the dropper to your eye, eyelid, or any other surface.
Follow Schedule: Try to use the drops at roughly the same times each day to maintain a consistent level of medication in your eyes.
Do Not Share: Eye drops are personal medicines. Never share your Perfluorohexyloctane with anyone else, even if they have similar symptoms.
If You Miss a Dose: If you forget a dose, use it as soon as you remember. However, if it’s almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double the dose to catch up.
Contact Lenses: If you wear contact lenses, your doctor will advise you on whether you need to remove them before using these drops and how long to wait before reinserting them. Always follow their specific instructions.

Always remember that this is a prescription medicine. Use it strictly as directed by your qualified ophthalmologist.

Always follow your ophthalmologist’s exact instructions.

Brands available in India

Miebo / EvoTears (limited availability in India)

Brand availability and pricing vary; confirm with your pharmacist.

Good to know

Prescription eye medicine — use only as directed by a qualified ophthalmologist. This page is for general education and is not a substitute for professional medical advice, diagnosis or a prescription. Do not self-medicate or reuse an old prescription. Not currently approved or routinely available in India — included for reference; ask your ophthalmologist about approved alternatives.

Precautions & side effects

As with any prescription medicine, it’s important to be aware of certain precautions when using Perfluorohexyloctane. Your ophthalmologist will have considered these factors when prescribing this medicine for you.

Prescription Medicine: Perfluorohexyloctane is a prescription eye medicine. It should only be used under the guidance and direction of a qualified ophthalmologist. Do not self-medicate or use an old prescription without consulting your doctor.
Novel Mechanism: This medicine works through a novel anti-evaporative mechanism, which means it’s different from many other eye drops you might have used. While this can be very effective for certain types of dry eye, it’s important that its use is guided by a specialist who understands its properties.
Limited Availability in India: Please note that Perfluorohexyloctane, under its brand names like Miebo or EvoTears, has limited availability in India. It is not currently approved or routinely available in all parts of India. This page is for general education and reference. If your ophthalmologist believes this type of treatment is suitable for you, they will discuss approved and available alternatives or provide specific guidance. Always ask your ophthalmologist about the options that are approved and readily available in India.
General Eye Drop Precautions:

Contamination: Always wash your hands before using eye drops. Do not touch the tip of the dropper to your eye, eyelid, or any other surface to prevent contamination.
Vision Changes: If you experience any sudden changes in vision, increased eye pain, redness, or irritation that worsens or persists, contact your ophthalmologist immediately.
Allergic Reactions: While rare, if you notice signs of an allergic reaction such as rash, itching, severe swelling of the face or eyelids, or difficulty breathing, seek immediate medical attention.
Other Eye Medicines: If you are using other eye drops or ointments, inform your ophthalmologist. They will advise you on the correct order and timing for applying different medications to avoid interactions.

This information is for general education and is not a substitute for professional medical advice, diagnosis, or a prescription. Always consult your ophthalmologist for personalized advice regarding your eye health.

Understanding Dry Eye and Meibomian Gland Dysfunction

Our eyes are truly remarkable organs, constantly working to help us see the world around us. For them to function optimally, they need to stay moist and lubricated. This is where our tears come in. Tears are not just water; they are a complex film made up of three main layers: a watery layer, a mucus layer, and an oily (lipid) layer. Each layer plays a crucial role in keeping the eye surface smooth, clear, and protected.

Dry eye disease is a very common condition that occurs when your eyes don’t produce enough quality tears, or when your tears evaporate too quickly. This can lead to a range of uncomfortable symptoms such as a gritty or sandy feeling, burning, stinging, redness, blurred vision, and sometimes even watery eyes (as the eyes try to compensate for the dryness). It can significantly impact your daily life, making activities like reading, using computers, or driving difficult.

One of the most frequent causes of dry eye, and the specific condition that Perfluorohexyloctane helps with, is Evaporative Dry Eye, often linked to Meibomian Gland Dysfunction (MGD). The meibomian glands are tiny glands located along the edges of your eyelids, both upper and lower. Their job is to produce the oily layer of your tears. This oil is vital because it forms a protective barrier on the surface of your eye, preventing the watery layer of your tears from evaporating too quickly. When these glands become blocked, inflamed, or don’t produce enough good quality oil, the tear film becomes unstable, leading to rapid tear evaporation and, consequently, dry eye symptoms. MGD is a chronic condition, meaning it often requires ongoing management.

Understanding your specific type of dry eye is important, as different types require different treatments. Your ophthalmologist will conduct a thorough examination to determine the cause of your dry eye and recommend the most appropriate treatment plan for you.

Correct Use and Hygiene for Eye Drops

Using eye drops correctly is essential for their effectiveness and to prevent complications like infection. Here are some general tips for proper eye drop instillation and hygiene:

Always Wash Your Hands: Before touching your eyes or the eye drop bottle, wash your hands thoroughly with soap and water. This is the most crucial step to prevent introducing germs into your eyes.
Do Not Touch the Dropper Tip: Never allow the tip of the eye drop bottle to touch your eye, eyelid, eyelashes, or any other surface. This can contaminate the medicine. If the tip does touch something, it’s best to discard the bottle and get a new one, as using contaminated drops can lead to serious eye infections.
Follow Instructions: Always follow your ophthalmologist’s specific instructions regarding the number of drops and how often to use them. Do not use more or less than prescribed.
Proper Technique: Tilt your head back, gently pull down your lower eyelid to create a small pocket, and look up. Squeeze the bottle to release one drop into the pocket. Close your eye gently for a minute or two to allow the medicine to spread and absorb. Avoid blinking excessively or squeezing your eyes shut tightly.
Wait Between Different Drops: If you are using more than one type of eye drop, wait at least 5-10 minutes between different medications. This prevents one drop from washing out the other. Your doctor will advise you on the correct order.
Storage: Store your eye drops as directed by your ophthalmologist or the instructions on the packaging. Generally, most eye drops should be stored at room temperature, away from direct sunlight and excessive heat. Do not freeze them unless specifically instructed.
Check Expiry Dates: Always check the expiry date on the bottle. Do not use expired medication. Also, most eye drop bottles should be discarded a certain period after opening (usually 4 weeks), even if there is still medicine left, to prevent contamination. Your doctor or pharmacist can confirm this for your specific medicine.

When to Seek Medical Attention

While Perfluorohexyloctane is prescribed to improve your eye comfort, it’s important to know when to contact your ophthalmologist. Your eye health is paramount, and prompt attention to new or worsening symptoms can prevent further complications.

Worsening Symptoms: If your dry eye symptoms (like redness, irritation, pain, or blurred vision) worsen, do not improve after a reasonable period of using the drops, or if you develop new symptoms.
Signs of Infection: Look out for signs of an eye infection, such as increased redness, swelling, discharge (pus), severe pain, or increased sensitivity to light.
Allergic Reaction: Although rare, if you experience any signs of an allergic reaction to the eye drops, such as itching, rash around the eyes, severe swelling of the eyelids or face, or difficulty breathing, seek immediate medical attention.
Changes in Vision: Any sudden or significant changes in your vision, such as decreased vision, halos around lights, or flashes of light, warrant immediate consultation with your ophthalmologist.
Eye Injury: If you experience any trauma or injury to your eye, stop using the drops and contact your doctor.
Questions or Concerns: If you have any questions or concerns about your medication, its side effects, or your eye condition, do not hesitate to contact Pristine Eye Hospitals or your ophthalmologist. It’s always better to clarify doubts than to make assumptions about your eye health.

Remember, this page provides general information and is not a substitute for personalized medical advice. Always consult your qualified ophthalmologist for diagnosis, treatment, and any specific concerns related to your eye health.

Frequently asked questions

What is Perfluorohexyloctane used for?

Perfluorohexyloctane is an eye drop medicine used to treat evaporative dry eye and meibomian gland dysfunction. These conditions cause your tears to evaporate too quickly, leading to discomfort and other dry eye symptoms.

How does Perfluorohexyloctane work?

This medicine is a water-free eye drop that forms a thin, protective layer over your tear film. This layer helps to slow down the evaporation of your natural tears, thereby improving the stability of your tear film and reducing dry eye symptoms.

What are the common brands of Perfluorohexyloctane available in India?

In India, Perfluorohexyloctane is known by brands such as Miebo and EvoTears. However, it's important to note that its availability in India is currently limited, and it may not be routinely available. Always ask your ophthalmologist about approved and available alternatives.

How should I use Perfluorohexyloctane eye drops?

The typical dosing is 1 drop into the affected eye(s) 4 times a day. Always wash your hands before use and avoid touching the dropper tip to your eye or any surface. Follow your ophthalmologist's specific instructions precisely.

Do I need a prescription for Perfluorohexyloctane?

Yes, Perfluorohexyloctane is a prescription eye medicine. You must use it only as directed by a qualified ophthalmologist. Do not self-medicate or use an old prescription.

What precautions should I take while using Perfluorohexyloctane?

It is a prescription medicine and should only be used as directed by your ophthalmologist. Be aware that its availability in India is limited. Always ensure proper hygiene when applying eye drops to prevent contamination. If you experience any worsening symptoms, new eye pain, redness, or vision changes, contact your doctor immediately.

References

Medically reviewed by Dr. C Jagadesh Reddy, Chief Surgeon: Cornea, Cataract and Refractive Surgery — last reviewed 2026-07-28.

This page is for general education only and is not a substitute for professional medical advice, diagnosis or treatment. Never self-medicate or reuse an old prescription. Always consult a qualified ophthalmologist before starting, changing or stopping any eye medicine.