opth Flashcards
AMD treatment
Wet = anti VEGF injections, Dry = zinc
blepharitis Mx
eye hygiene and warm compress
hypertensive retinopathy grades
A 73 year old male presents with recurrent episodes of pain around their right eye. The eye is not red but there is some redness medial to the right canthus. He complains of some blurring of his vision due to tearing but he has no vision loss, floaters or flashes. This is his third episode.
What is the most appropriate management plan?
Dacrystorhinostomy
This patient has features of dacrocystitis which is an infection of the lacrimal sac due to gram-positive bacteria. It typically occurs due to nasal-lacrimal duct obstruction leading to stagnation of tears which then gets infected. Management of recurrent cases requires surgical fixation of the duct obstruction.
A 76 year old man presents 4 days after cataract surgery to his right eye with a painful red right eye.
On examination he has a severely injected conjunctiva and a white fluid level in the anterior chamber.
What is the most likely diagnosis?
A red eye post-surgery should prompt the diagnosis of endophthalmitis, which is infection inside the patient’s eye. This patient also has a hypopyon, described in the stem as a ‘white fluid level’, which is a collection of pus in the anterior chamber and indicates intraocular inflammation
CRAO doesn’t usually have
floaters
A patient who presents with sudden visual loss, floaters, and a curtain falling over the vision with a history of poorly controlled diabetes is likely experiencing a
vitreous haemorrhage. The inability to visualise the fundus on ophthalmoscopy due to dense opacities further supports this.
Vitreous haemorrhage presents and is associated with
sudden, painless loss of vision. However, it is typically associated with the use of anticoagulants and a history of diabetes. Rather than floaters and flashes of light, “dark spots” are often described by patients, referring to moderate bleeds.
Retinal detachment features - sudden, painless loss of vision occurs.
Often preceded by symptoms of posterior vitreous detachment: flashes of light and the presence of floaters.
risk factors and Mx of retinal detachment
Severe myopia is a risk factor, as is previous cataract surgery. Urgent referral to the ophthalmology team is warranted for consideration of surgery.
jaw claudication and weight loss support
GCA diagnosis
Redness, blurred vision, pain and mild photophobia in a patient that wears contact lenses and is an alcoholic should raise a strong suspicion of
bacterial keratitis. His social history suggests that he may often fall asleep before removing his lenses, increasing his risk. A broad spectrum topical antibiotic, such as gatifloxacin, should be commenced and an urgent referral made to the ophthalmologist. The patient should stop wearing contact lenses until advised otherwise by an ophthalmologist.
penetrating foreign body looking for injury Ix
CT orbit
B USS used to detect
retinal detachment
gonococcal conjunctivitis features
usually within 3 days of birth, mother would not have tender inguinal lump (this occurs with chalmydia, onset of this conjunctivitis neonatorum is 4-28 days )
anti phospholipid syndrome causing CRAO test with
anti-cardiolipin antibodies
treatment for acute progression acute progression of dry ARDM to wet ARMD
Intra-vitreal anti-vascular endothelial growth factor (VEGF) injection
This patient is presenting with acute progression of dry ARDM to wet ARMD. When treating wet ARMD, prevention of further neovascularisation is essential. This is achieved through anti-VEGF agents such as Bevacizumab, which can be injected directly into the vitreous to increase its bioavailability to the choroid
An 86 year old woman attends eye casualty. She has a background of type 2 diabetes mellitus, Grave’s disease, hypertension, angina and atrial fibrillation for which she takes warfarin. She complains of floaters and dark streaks across her visual field which came on suddenly one day ago
vitreous haemorrhage - DM
A 27 year old man attends A&E. He presented with a 2 day history of sudden onset vision loss in his right eye. On moving his right eye, he experiences pain behind his eye. He has a relative afferent pupillary defect of his right eye and a loss of his central visual field. His ability to distinguish between colours, particularly red, is diminished. Fundoscopy reveals a unilateral right sided papilloedema.
Given the likely diagnosis, what is the single best investigation?
MRI head
This patient is suffering from optic neuritis – an inflammatory demyelinating condition of the optic nerve. An MRI head is an important investigation to investigate for any further demyelinating plaques in the CNS that may suggest multiple sclerosis. 40-70% of optic neuritis cases will have, or go on to develop multiple sclerosis
A rapidly growing, well differentiated lesion on eyelid that is “dome shaped” in appearance is descriptive of
keratoacanthoma. It is considered to be a well differentiated form of squamous cell carcinoma