Corneal Disease/Infections Flashcards
In patients with any disease of the cornea, which of the following is common in nearly all patients?
1 - red eye
2 - photophobia
3 - foreign object feeling
4 - dry eyes
2 - photophobia
Typically acute in onset
Which 2 of the following should always be asked about in patients who present with suspected corneal disease?
1 - autoimmune conditions
2 - cold sore history
3 - swimming history
4 - contact lens history
2 - cold sore history
4 - contact lens history
Which 2 of the following can cause dry eye and lead to corneal disease?
1 - blepharitis
2 - eczema
3 - glaucoma
4 - cataracts
1 - blepharitis
2 - eczema
Do daily or monthly contact lens wearers have a greater risk of corneal infection?
- monthly users
Which of the following does NOT increase the risk of contact lens associated infection?
1 - swimming with contact lens
2 - cleaning with sterile solutions
3 - cleaning with tap water
4 - sleeping in contact lens
2 - cleaning with sterile solutions
All of the others can increase the risk of infection
What is the most common organism associated with corneal infection due to contact lenses?
1 - staphylococcus aureus
2 - streptococcus pneumoniae
3 - klebsiella pneumoniae
4 - pseudomonas aeruginosa
4 - pseudomonas aeruginosa
Gram negative bacteria
Pseudomonas aeruginosa is the most common organism associated with corneal infection due to contact lenses. Which of the following is an appropriate 1st line treatment for a Pseudomonas aeruginosa eye infection?
1 - narrow spectrum antibiotics sensitive to Gram negative bacteria
2 - broad spectrum antibiotics sensitive to Gram negative bacteria
3 - broad spectrum antibiotics sensitive to Gram positive bacteria
4 - narrow spectrum antibiotics sensitive to Gram positive bacteria
2 - broad spectrum antibiotics sensitive to Gram negative bacteria
Pseudomonas aeruginosa is the most common organism associated with corneal infection due to contact lenses. Which of the following is NOT an appropriate treatment for a Pseudomonas aeruginosa eye infection?
1 - chlorophenicol
2 - flouroquinolone (Ofloxacin)
3 - cephalosporin (Cefuroxime)
4 - none of the above are suitable
1 - chlorophenicol
This is normally the most commonly used antibiotics used to treat occular infections, but THIS IS NOT EFFECTIVE against Pseudomonas aeruginosa
Acanthamoeba, a genus of ameoba, is an infection of the eye and is common in contact lens wearers. Which 2 of the following risk factors are most likely to cause Acanthamoeba in contact lens wearers?
1 - swimming with contact lens
2 - cleaning with sterile solutions
3 - cleaning with tap water
4 - sleeping in contact lens
1 - swimming with contact lens
3 - cleaning with tap water
Acanthamoeba can be found in tap water and swimming pools
Does Acanthamoeba typically present with acute onset or insidiously?
- insidiously
Intense pain and photophobia
Patients with Acanthamoeba can have insidiously onset of intense pain and photophobia. But what can clinicians see early on in patients with Acanthamoeba?
1 - eye looks healthy
2 - red eyes
3 - early signs of corneal ulcer
4 - episcleritis
1 - eye looks healthy
This can make it very difficult to diagnose early , but needs confocal microscopy to visualise the cysts.
Late diagnose can lead to ulcers and even vision loss
How is Acanthamoeba treated?
1 - high dose topical antibiotics
2 - given hourly
3 - admit to hospital to monitor
4 - all of the above
4 - all of the above