Chlorhexidine ophthalmic eye drops are an anti-infective medicine used to treat a serious eye infection called Acanthamoeba keratitis.
| Drug class | Anti-amoebic |
|---|---|
| Type | Single |
| Forms | Eye Drop |
| Common strength | 0.02% |
| Common Indian brands | Prepared in hospital pharmacy |
| Prescription status | Prescription (hospital-prepared) |
What Chlorhexidine (ophthalmic) is used for
Chlorhexidine ophthalmic eye drops are used to treat a severe eye infection known as Acanthamoeba keratitis. This is a rare but serious infection of the cornea (the clear front part of your eye) caused by a microscopic organism called Acanthamoeba.
- Acanthamoeba keratitis
How it works
Chlorhexidine ophthalmic works by directly killing the Acanthamoeba organism. It is effective against both the active form of the amoeba and its protective cyst form, which helps to eradicate the infection from the eye. It is usually used in combination with other medicines like PHMB to provide a comprehensive attack against this stubborn infection.
How it’s used
Chlorhexidine ophthalmic eye drops are typically prescribed by a corneal specialist as part of a long and intensive treatment plan for Acanthamoeba keratitis. The initial dosing usually involves applying the eye drops hourly. As your eye condition improves and under the guidance of your doctor, the frequency of application will be gradually reduced or ‘tapered’. It is crucial to follow your doctor’s exact instructions regarding the dosing schedule and duration of treatment, even if your eye feels better. Stopping the medicine too soon can lead to a recurrence of the infection.
Since this medicine is specially prepared in a hospital pharmacy, your doctor or a healthcare professional will guide you on its proper use and storage.
Always follow your ophthalmologist’s exact instructions.
Brands available in India
- Prepared in hospital pharmacy
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. This is given only by specialists in a hospital or clinic setting and is never for self-use.
Precautions & side effects
Chlorhexidine ophthalmic eye drops are a powerful medicine used for a serious eye infection. It is vital to use this medicine only under the strict supervision of a qualified ophthalmologist, especially a corneal specialist. Here are some key precautions:
- Specialist Care: This medicine is always used as part of a long and complex treatment regimen for Acanthamoeba keratitis, which is managed by a corneal specialist.
- Prescription Only: This is a prescription eye medicine. Never use it without a doctor’s prescription, and do not self-medicate or reuse an old prescription.
- Hospital/Clinic Use: This medicine is typically given only by specialists in a hospital or clinic setting and is never for self-use at home without proper guidance.
- Follow Instructions: Adhere strictly to the dosing schedule and duration prescribed by your doctor. Do not stop treatment prematurely, even if your symptoms improve, as this can lead to the infection returning.
- Hygiene: Always maintain excellent hand hygiene before and after applying eye drops to prevent further contamination.
- No Sharing: Do not share your eye drops with anyone else, as this can spread infection.
- Report Side Effects: If you experience any unusual irritation, redness, pain, or vision changes after using the drops, contact your ophthalmologist immediately.
This page is for general education and is not a substitute for professional medical advice, diagnosis, or a prescription. Always consult your ophthalmologist for any concerns regarding your eye health.
Understanding Acanthamoeba Keratitis
Acanthamoeba keratitis is a rare but very serious eye infection that affects the cornea, which is the clear, dome-shaped front surface of your eye. The infection is caused by a microscopic organism called Acanthamoeba, which is commonly found in water sources like tap water, swimming pools, hot tubs, and even soil. While anyone can get this infection, it is most common among contact lens wearers who do not follow proper hygiene practices. For instance, rinsing contact lenses with tap water, swimming or showering while wearing lenses, or not cleaning and storing lenses properly can introduce the amoeba into the eye.
Symptoms of Acanthamoeba keratitis can include severe eye pain, redness, blurred vision, sensitivity to light (photophobia), and a feeling that something is in your eye. Because these symptoms can be similar to other, less serious eye infections, it is crucial to see an ophthalmologist immediately if you experience any of these signs, especially if you are a contact lens wearer. Early diagnosis and treatment are vital to prevent severe vision loss or even the need for a corneal transplant.
Treatment for Acanthamoeba keratitis is often prolonged and intensive, requiring a combination of anti-amoebic medications, such as Chlorhexidine ophthalmic, often along with other medicines like PHMB. It is a challenging infection to treat because the amoeba can form protective cysts that are resistant to many treatments. Therefore, strict adherence to your doctor’s prescribed regimen is absolutely essential for a successful outcome.
How to Use Eye Drops Correctly
Using eye drops correctly is very important to ensure the medicine works effectively and to prevent contamination. Here’s a general guide:
- Wash Your Hands: Always wash your hands thoroughly with soap and water before touching your eyes or the eye drop bottle.
- Check the Bottle: Make sure the bottle is clean and the dropper tip is not damaged. Do not let the dropper tip touch any surface, including your eye, eyelid, or fingers, to prevent contamination.
- Tilt Your Head: Gently tilt your head back or lie down.
- Create a Pocket: With one hand, gently pull down your lower eyelid to create a small pocket.
- Instil the Drop: Hold the eye drop bottle upside down with the other hand, positioning the tip directly over your eye. Look up and gently squeeze the bottle to release one drop into the pocket you created.
- Close Your Eye: Close your eye gently for a minute or two. Do not blink or squeeze your eye shut tightly, as this can push the medicine out.
- Apply Pressure (Optional): You can gently press your finger against the inner corner of your eye (near your nose) for a minute or two. This helps prevent the medicine from draining into your tear duct and entering your bloodstream, which can reduce potential side effects.
- Wipe Excess: Gently blot any excess liquid around your eye with a clean tissue.
- Wash Hands Again: Wash your hands again after applying the drops.
- Multiple Drops: If you need to use more than one type of eye drop, wait at least 5-10 minutes between different medications to allow each drop to be absorbed properly.
Always follow the specific instructions given by your doctor or pharmacist, as some medicines may have unique application methods.
General Eye Care, Storage, and When to Seek Help
Maintaining good eye hygiene is crucial, especially when dealing with an eye infection. Always use fresh, clean tissues to wipe your eyes, and avoid rubbing your eyes, which can worsen irritation or spread infection. If you wear contact lenses, it is usually recommended to stop wearing them during treatment for Acanthamoeba keratitis and only resume if your doctor advises it. Always follow your ophthalmologist’s advice regarding contact lens care, even after your infection has cleared, to prevent recurrence.
Store your eye drops as instructed by your hospital pharmacy or doctor. Generally, eye drops should be stored in a cool, dry place, away from direct sunlight and out of reach of children. Do not use eye drops past their expiry date, and discard any remaining medicine after the recommended period (usually 28 days after opening, unless otherwise specified).
It is important to be vigilant about your eye health. If you experience any new or worsening symptoms such as increased pain, redness, discharge, blurred vision, or sensitivity to light, contact Pristine Eye Hospitals or your ophthalmologist immediately. Do not wait for your next scheduled appointment if your symptoms are severe or concerning. Your doctor will monitor your progress closely and adjust your treatment plan as needed. Remember, your vision is precious, and timely medical attention is key to preserving it.
Frequently asked questions
What is Chlorhexidine (ophthalmic) used for?
Chlorhexidine (ophthalmic) eye drops are used to treat a serious eye infection called Acanthamoeba keratitis, which affects the clear front part of your eye (cornea).
How does Chlorhexidine (ophthalmic) work?
Chlorhexidine (ophthalmic) works by killing the microscopic organism called Acanthamoeba, including both its active form and its protective cyst form, which helps to clear the infection from your eye.
What are the common Indian brands for Chlorhexidine (ophthalmic)?
Chlorhexidine (ophthalmic) eye drops are typically prepared in a hospital pharmacy and are not available under specific commercial brand names in the market.
How should I use Chlorhexidine (ophthalmic) eye drops?
You should use Chlorhexidine (ophthalmic) eye drops exactly as directed by your ophthalmologist. Initially, it is often used hourly, and then the frequency is gradually reduced as your condition improves. Always follow your doctor's precise instructions for dosing and duration.
Do I need a prescription for Chlorhexidine (ophthalmic)?
Yes, Chlorhexidine (ophthalmic) is a prescription-only eye medicine. It is specially prepared in a hospital pharmacy and must only be used under the guidance of a qualified ophthalmologist, typically a corneal specialist.
What are the key precautions to take while using Chlorhexidine (ophthalmic)?
Key precautions include using it only as directed by a corneal specialist as part of a long treatment regimen, never self-medicating, and understanding that it is typically given in a hospital or clinic setting. Always maintain good hygiene and report any unusual side effects to your doctor immediately.
References
- Chlorhexidine Monotherapy with Adjunctive Topical Corticosteroids for Acanthamoeba Keratitis – PMC
- Acanthamoeba Keratitis Treatment – American Academy of Ophthalmology
- Conjunctivitis – MedlinePlus
- Learn about eye health – National Eye Institute (NIH)
- Blindness and vision impairment – World Health Organization
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.