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.

You really make it seem really easy together with your
presentation however I find this topic to be actually one thing which I
feel I'd by no means understand. It sort of feels too
complicated and extremely extensive for me. I am taking
a look ahead for your subsequent put up, I will try to get
the cling of it!

My web-site: football turf training shoes (Shanon)

Greetings! Quick question that's entirely off topic. Do you know how to make your site mobile friendly?
My web ste looks weird when viewing from my iphone4. I'm ttrying to
find a theme or plugin that might be able to resolve this issue.
If you have any recommendations, please share.
With thanks!

Feeel free to surf to my web page; stop smoking hypnosis ma

Well written and done.
I began bloging myself recently and realized many artiocles merely rework old ideas
but addd very litftle of worth. It's great to see an eduucational write-up of some actual value to myself aand your otther followers.

It is going down on the list of things I need too replicate as a new blogger.
Reader engagementt annd conjtent quality are king.
Many fantastuc thoughts; yyou have unquestionably made it on my list of writers to follow!

Carry oon the terrific work!
Well done,

My web blog ... cellphone IMEI unlock codes (

whoah this weblog is wonderful i loce studying your
posts. Keep up the great work! Youu understand, lots of people are searching round for this
information, you could aid them greatly.

Feel free to visit my website: keyyword research service

whoah this weblog is wonderful i loce studying your
posts. Keep up the great work! Youu understand, lots of people are searching round for this
information, you could aid them greatly.

Feel free to visit my website: keyyword research service

In such cases you'll be able to consult several insurance carriers to get a good offer which supports you a lot.
Bottom line is, if you are looking for raw detection distance, opt for the Escort Redline, if
you are searching to find the best reaction time, choose the Valentine One, however, if you are trying to
find a radar detector that doesn't alert unnecessarily,
choose the Escort Passport 9500ix. Posting a fake photograph ought to be avoided, because it will
still only bring about trouble.

Also visit my blog; website [Terence]

Hi, its nice paragraph on the topic of media print, we all
understand media is a impressive source of data.

Feel free to visit my page: lesbian

Small scale social media owners always find solutions to improve the variety of their subscriber members.
What you want coming from a free internet dating site is the hook you will
want to use to get your profile noticed. The life of an pilot car is very
similar to a trucker because it requires endless driving with limited interruptions.

Look into my web blog: click here (Eric)

If you are a man that still hasn't met the lady
of your dreams, then online dating services
could be an interesting venue for you. For example, you could
be a male that's trying to find a vegetarian, left-wing
woman with blue eyes who doesn't smoke and lives in just a certain distance
from a home. Posting a fake photograph should
be avoided, as it is only going to lead to trouble.

my website :: check this (Irving)

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.