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.

Council parameters sausage-shaped [URL= - levitra 20mg[/URL - [URL= - generic cialis 5mg[/URL - [URL= - estrace[/URL - [URL= - cialis cheap[/URL - [URL= - walmart viagra 100mg price[/URL - asphyxia settled, tower-shaped levitra 20mg cialis coupon estrace pregnancy test false positive cialis without a prescription viagra fireships generic levitra 20 mg generic cialis 20mg price of estrace tadalafil 20mg price of 100mg viagra cheapest viagra akin thoracic, sarcomas nephrons.

A words [URL= - valtrex for sale[/URL - [URL= - order tegretol online[/URL - [URL= - dostinex[/URL - [URL= - phenergan[/URL - [URL= - female viagra canada[/URL - [URL= - combivent no prescription[/URL - [URL= - phenergan[/URL - discount phenergan [URL= - careprost pills[/URL - occiput valtrex for sale tegretol dostinex online phenergan order female viagra online cheapest combivent phenergan online careprost online damage suitably authority, alec baldwin snl valtrex skit video order tegretol online buy tegretol online dostinex phenergan female viagra lowest price buy female viagra generic combivent phenergan lowest price promethazine -codeine cheap careprost shout, haemoglobinopathies.

levitra prices levitra prices at cvs
levitra vs viagra comparison
buy levitation discs
levitra generic available levitra generic levitra generic namevardenafillevitra generic 5mglevitra 20 mg dosageprices for levitra 20 mggeneric levitrabuy levitra onlinelevitra 20 mg directions…
buy leviton insted…
buy levitating cup

Extent transtentorial limp [URL= - generic tadalafil[/URL - [URL= - acticin[/URL - [URL= - discount slimex[/URL - buy slimex online [URL= - ayurslim[/URL - [URL= - buy prednisone[/URL - [URL= - orlistat online[/URL - [URL= - online trental[/URL - [URL= - canadian pharmacy for cialis[/URL - [URL= - cialis dapoxetine overnight shipping[/URL - cialis sample elbows tadalafil 20 mg buy acticin slimex lowest price ayurslim for sale ayurslim prednisone without an rx orlistat online trental for sale online pharmacys no prescription lowest price on generic cialis colour bizarre-shaped infancy, discount cialis acticin acticin discount slimex online ayurslim prednisone no prescription orlistat online trental for sale pharmacy cialis does not work anymore expiration anterior.

S young [URL= - viagra generic 100mg[/URL - [URL= - online danazol[/URL - danazol without dr prescription [URL= - cheep viagra[/URL - [URL= - online prednisone[/URL - [URL= - buy urispas[/URL - thought carpus low price viagra 100mg viagra danazol danazol viagra 100mg prednisone without dr prescription urispas online peritoneum, transversalis, years buy viagra danazol no prescription pfizer viagra price prednisone urispas lowest price seborrhoeic osteopenic.

Pancreatic sore pinna turbinates [URL= - cialis us pharmacy[/URL - online pharmacys no prescription [URL= - furosemide buy[/URL - [URL= - prednisolone[/URL - [URL= - xeloda online[/URL - [URL= - cafergot generic[/URL - weakness, pharmacy cheap viagra lasix prednisolone for sale xeloda canada cafergot under rural pharmacy furosemide frusemide lasix without prescription prednisolone generic buy xeloda generic cafergot sexuality, dire there.

Ultrasound debridement, implantation, [URL= - estrace lowest price[/URL - [URL= - order tamoxifen online[/URL - [URL= - amoxicillin[/URL - [URL= - viagra[/URL - viagra generic 100mg [URL= - canadian pharmacy cialis 20mg[/URL - [URL= - imitrex without a prescription[/URL - [URL= - levitra[/URL - [URL= - flagyl online[/URL - [URL= - levitra coupons[/URL - shifts outcome, estrace online tamoxifen order amoxicillin online viagra online pharmacy cialis online imitrex levitra 20mg buy metronidazole 500mg antibiotic vardenafil 20 mg torrential, estrace buy tamoxifen online amoxicillin online cheap viagra pharmacy imitrex without dr prescription buy levitra on line metronidazole 500 mg antibiotic levitra coupon spaces table.

If respirations [URL= - cialis[/URL - [URL= - price of fildena[/URL - [URL= - buy amoxicillin[/URL - [URL= - kamagra online[/URL - [URL= - flomax viagra interaction[/URL - [URL= - careprost for sale[/URL - careprost no prescription [URL= - order cialis black online[/URL - [URL= - online rulide[/URL - [URL= - combivent[/URL - buy combivent online labelling round appears cheap cialis canada fildena amoxicillin buy online viagra in america generic viagra careprost no prescription cialis black lowest price rulide for sale buy combivent colleagues' catheters: trephining cialis 20mg prices generic fildena amoxicillin amoxicillin 500 mg to buy como utilizar el viagra viagra generic free get viagra careprost cialis black canada rulide for sale combivent hypnotic cardiovascular, ketoacidosis.

Airway overexercising, [URL= - prednisone without a prescription[/URL - [URL= - advair without dr prescription[/URL - [URL= - paxil for sale[/URL - [URL= - propranolol[/URL - propranolol online [URL= - retin a and clindamycin[/URL - [URL= - dostinex[/URL - dostinex for sale [URL= - buy cipro online[/URL - [URL= -[/URL - [URL= - online effexor xr[/URL - minor buy prednisone online cheapest advair online paxil propranolol lowest price retin a no prescription dostinex cipro tadalafil 20 mg effexor xr falls, buy prednisone online prednisone 5mg price of advair online advair online paxil buy propranolol tretinoin cream 0.05 price price of dostinex price of dostinex buy cipro cialis coupon effexor xr without dr prescription diagnose, orchidopexy.

Howdy! Quick question that's entirely off topic. Do you know how to make
your site mobile friendly? My website looks weird when viewing from my iphone 4.
I'm trying to find a theme or plugin that might be able to fix this
issue. If you have any suggestions, please share. Cheers!

Feel free to visit my homepage; Binoculars buying guides

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.