Eye Pathologies Flashcards
For conjunctivitis, what is the likely cause if the discharge is purulent, thick and unilateral?
Bacterial (which is usually self-limitied, though antibiotic drops can shorten duration).
How do you treat keratitis?
You give ciprofloxacin eyedrops to treat against Pseudomonas.
What are the causes of red eyes that are emergencies?
Scleritis, uveitis, and keratitis.
What is the most common cause of conjunctivitis?
Staph. aureus
What is keratitis and what causes it?
It is infection and inflammation of the cornea, and most commonly results from bacterial infection (especially with Pseudomonas species) in contact lens wearers.
What are the signs and symptoms of retinal detachment?
Sudden-onset monocular blindness (descrive as veil like), and retinal detachment is painful.
What are the symptoms of cataracts?
Blurred vision, sensitivity to glare, and difficulty with night driving.
What is the most common cause of red eye?
Conjunctivitis as infectious (viral or bacterial) or noninfectious (irritants, allergic).
For conjunctivitis, what is the likely cause if the discharge is watery?
Likely viral (specifically adenovirus).
What are the signs and symptoms of acute angle-closure glaucoma?
Extreme eye pain and a poorly reactive mid-dilated pupil. There may also be paralysis of extraocular muscles, vision changes, cloudiness, nausea and vomiting, etc.
What are the signs and symptoms of retinal detachment?
Sudden-onset monocular blindness (descrive as veil like), and retinal detachment is painful.
Term for when cornea and lens can perfectly focus light on the retina
Emmetropia
What is hyperopia?
Farsightedness
Cause of hyperopia
Axial length of eye is too short for the refractive power of the cornea and lens
Light focuses behind retina
What lenses can correct hyperopia
convex or converging
