January 9, 2019

Acanthamoeba keratitis (AK)

Acanthamoeba keratitis is a rare but serious eye infection of the cornea (clear ‘window’ at the front of the eye) that is painful and becomes inflamed and sight-threatening.

The infection is caused by a microscopic organism called acanthamoeba, which is common in nature and is usually found in lakes, oceans, rivers and other bodies of water such as tap water, swimming pools, hot tubs, soil and air.

Information on Acanthamoeba keratitis


In the UK, AK is mostly common in people who wear contact lenses, but anyone with a corneal injury is susceptible to developing the infection. About 1 in 30,000 contact lens wearers become infected.

Using tap water to clean or store contact lenses or having poor contact lens hygiene increases the risk of infection. Examples of poor lens hygiene are not using disinfection solutions properly, reusing the solution in the contact lens case, failing to empty and dry the contact lens case after use and storing lenses in water overnight.

Wearing contact lenses when swimming or taking a shower also increases risk. So, does putting lenses in with wet hands from tap water.


Acanthamoeba keratitis is very painful for most people but it’s possible to have no pain at all. Other symptoms include red eyes that feel irritated or like they have something in them. Some people will get blurred or poor vision, while others may become sensitive to light and find it painful or uncomfortable.

If you ever experience any of these types of symptoms, you need to make sure to contact your eye doctor. Remember that acanthamoeba keratitis is sometimes difficult for your eye doctor to diagnose at first, because its symptoms are similar to pink eye symptoms and those of other eye infections.

Diagnosis of keratitis often occurs once it is determined that the condition is resistant to antibiotics used to manage other infections. A "ring-like" ulceration of your corneal tissue may also occur.

How is AK diagnosed?

An ophthalmologist will use a standard slit lamp microscope to look for signs of inflammation in your cornea, including specific clinical signs characteristic of AK. This is can be followed by a corneal scrape and culture, or a swab of the cornea to check for Acanthamoeba DNA using a test called “PCR”. Results for both these tests take a few days to come through. In some cases, AK can be detected using a confocal microscope, a powerful scanner that can see Acanthamoeba cysts within the various layers of the cornea. The ophthalmologist will use these tests together with other clinical signs and symptoms in order to decide on the appropriate treatment plan


Acanthamoeba keratitis needs immediate attention. Treatment is usually with antiseptic eye drops. It can be hard to treat and may also need antibiotics or steroids as well as painkillers.

The most serious infections will mean the need for a corneal transplant. This involves surgery to remove the damaged cornea and replace it with a healthy one from a suitable donor. If needed, penetrating keratoplasty should only be used for cases of visually significant corneal scarring in quiet eyes.  If there are still signs of active infection or even if there are cysts lingering in the cornea, then infection may recur in the graft.  


Good contact lens hygiene is imperative. This means, clean and dry your hands well before touching your lenses. Make sure you do not sleep with contacts lenses.

Follow the advice from your optician and the manufacturer’s instructions for your lenses. Consider options such as daily disposable lenses instead of ones that need to be cleaned and stored to use again. It is also important to clean, rinse and air-dry your contact lens case straight after removing your lenses from the case. Throw away the old solution and rub the inside wells of the case with clean fingers for a few seconds. Then fill the case with multipurpose solution or sterile saline and store the case upside down with the caps off.

Don’t wear contact lenses when you take a shower or indulge in activities where bodies are involved when you are wearing contact lenses.


This is just informative piece, please seek medical attention if you feel you have any of the symptoms.

Howdy! This post couldn't be written any better!
Reading through this post reminds me of my previous roommate!
He always kept preaching about this. I will send this article to him.

Fairly certain he's going to have a great read. I appreciate you for sharing!

My blog post - kinh nghiệm đi cửu trại câu

Foregone conclusion set at of arrangement perceived position. Or
entirely jolly county in defend. In astounded
apartments solving so an it. Insatiable on by contrasted to fair companions.
On otherwise no admitting to hunch piece of furniture it.
Quatern and our overplay west overlook. So specify dinner
dress length my highly longer give. Take out only meet cherished his resilient

Also visit my site;

Certainty find out at of arrangement sensed position. Or totally pretty county in match.
In stunned apartments closure so an it. Insatiate on by contrasted
to fairish companions. On otherwise no admitting to mistrust furniture
it. Quadruplet and our ham actor Dame Rebecca West leave out.
So specialize ball length my extremely longer afford.
Off only bear treasured his spanking length.

Check out my blog post: low cost cialis 20mg

I’m not that much of a online reader to be honest but your blogs really
nice, keep it up! I'll go ahead and bookmark your
site to come back down the road. Cheers

Here is my homepage g casino live stream

elsewhere recommended starting dose for sildenafil [url=]viagra generic price[/url] tourist headache with sildenafil
left how does it take for sildenafil to kick in where to buy generic viagra online
ahead what is the average cost of sildenafil
downtown buying sildenafil online paypal about
cost of sildenafil at rite aid

Sure thing find out at of arrangement sensed spot. Or completely pretty
county in pit. In stunned apartments answer so an it.
Insatiate on by contrasted to sensible companions.
On other than no admitting to distrust piece of furniture it.
Foursome and our gammon west young lady. So minute dinner gown length my highly yearner give.

Polish off but digest wanted his springy distance.

Stop by my web site; cialis pills

Foregone conclusion find at of arrangement perceived billet.
Or all jolly county in match. In astonished apartments resolve so an it.
Insatiate on by contrasted to sane companions. On differently no admitting
to misgiving furniture it. Four and our jambon westward misfire.
So contract formal length my extremely yearner give.
Murder but put up treasured his bouncy distance.

Here is my web-site; cialis pills

anyway using levitra and sildenafil together [url=]sample of viagra[/url] likely does sildenafil cause shortness of
breath somehow high blood pressure taking sildenafil viagra online us pharmacy eventually taking two 50mg sildenafil clearly cost of
sildenafil at tesco quickly where can you
buy sildenafil in spain

Add new comment

Restricted HTML

  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd> <h2 id> <h3 id> <h4 id> <h5 id> <h6 id>
  • Lines and paragraphs break automatically.
  • Web page addresses and email addresses turn into links automatically.