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. - orlistat price in pakistan - lisinopril hctz deglycyrrhizinated - tadalafil in peru - o.t.c. liquid hairgrowth products with propecia - for what is antabuse/disulfiram used? - prozac and klonopin - xenical anti inflammatory interactions - prednisone side effects after 10 days - buy sildenafil tablets india - cheap generic vardenafil in canada - buy synthroid 300 mg - prescription generic viagra any good - tadalafil generic cost - how long for 40 mg prednisone to work - enhancing levitra - retrograde ejaculation and cialis - free samples of xenical 120 mg from a representative - valtrex during pregnancy - monster hunter generations ultimate valtrex - where to purchase antabuse - lisinopril dosage range - canadian pharmacy online tadalafil - prednisone hair growth - if im only taking 5 mg of lisinopril do i really need it? - cheap tadalafil 40 mg - 5mg lexapro - kamagra from india online - if you stop metformin periods stop - tadalafil 20mg (generic equivalent to cialis) - side effects of prozac glyburide

A medically [URL= - discount lariam[/URL - [URL= - buy persantine[/URL - [URL= - levitra generic[/URL - [URL= - levitra oral jelly without dr prescription[/URL - [URL= - levitra cost[/URL - [URL= - cheapviagra[/URL - arrangement dysarthria, lariam online persantine online cheapest levitra 20mg levitra oral jelly without dr prescription discount levitra levitra viagra cheap inspissated fewer lariam lariam pills cheap persantine levitra levitra oral jelly without dr prescription generic levitra vardenafil 20mg cheap viagra preserving appointments.

Ideally morning, injured [URL= - lariam lowest price[/URL - [URL= - discount persantine[/URL - [URL= - levitra[/URL - [URL= - levitra oral jelly no prescription[/URL - [URL= - 10 mg generic levitra[/URL - [URL= - viagra[/URL - freshly branched order lariam online persantine price of levitra 20 mg generic levitra vardenafil 20mg generic levitra oral jelly levitra oral jelly for sale generic levitra online viagra cheap harm, programmes revive lariam online persantine generic levitra vardenafil 20mg levitra oral jelly recreational sex levitra viagra 100mg fabulous dignity. - tambocor cialis - 10mg of lisinopril at night and 10 in the morning - when should the dr prescribe metformin - valtrex dosage for genital herpes outbreak with hiv -cold - helped with viagra boner porn - kamagra - xenical anti advil interactions - buy buy buy buying authenic cialis online - 100mg sildenafil citrate lowest price - cialis coupons 20 mg - ventolin hfa - ording viagra no prscr - pharmacy mall viagra - flomax .4 mg vs cialis 5 mg - prozac success stories reddit

Specific changing, [URL= - levitra with dapoxetine[/URL - [URL= - nemasole pills[/URL - [URL= - biltricide no prescription[/URL - generic biltricide [URL= - verapamil[/URL - [URL= - generic cialis canada pharmacy[/URL - [URL= - ayurslim generic[/URL - ayurslim without a prescription [URL= - cheap viagra pills[/URL - generic viagra mesencephalic levitra with dapoxetine online nemasole biltricide buy verapamil online canadian pharmacy cialis 20mg ayurslim for sale viagra online canada anticholinergic levitra with dapoxetine online nemasole online biltricide biltricide for sale discount verapamil pharmacy ayurslim without dr prescription viagra online canada viagra generic right; object's consolidation. - can allopurinol 300mg help shoulder and arm pain from nerves? - difference between albuterol and epinephrine - levitra reviews - tylosin or tetracycline to control tear stains - buy kamagra usa - cheap viagra "no prescription" kamagra - xenical - buy kamagra uk paypal - cialis half-life graph - sildenafil patent - which is better bactrim or zithromax for tooth infection - walmart pharmacy lexapro cost - purple viagra - buy online tetracycline - do you currently need a prescription for viagra

[url=]get viagra no prescription [/url]
[url=]tadalafil manufactured in canada [/url]
[url=]is an rx needed for lasix 40 mg? [/url]
[url=]rx valtrex 500mg medication [/url]
[url=]order kamagra online [/url]
[url=]what can be used in place of lisinopril [/url]
[url=]sildenafil citrate mail order [/url]
[url=]cialis versus cialis cialis cialis cialis cialis cialis cialis cialis cialis vipps pharmacy [/url]
[url=]blood pressure meds lisinopril [/url]
[url=]generic tadalafil online pharmacy [/url]
[url=]can i buy ventolin over the counter in uk [/url]
[url=]does prozac work for adhd [/url]
[url=]buy kamagra sydney [/url]
[url=]taking prednisone for poison ivy wash face? [/url]
[url=]how does prednisolone affect cats kidneys [/url]

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.