loss of vision Flashcards
what examinations would you do with loss of vision?
Best Corrected Visual Acuity
Snellen Chart
Fundal examination – direct ophthalmoscope
slit lamp & volk lens
what are ancillary tests?
Amsler Chart Colour Vision Visual field assessment Flurescein Angiography Optical Coherence Tomography
what causes loss of vision?
Central retinal artery occlusion
Central retinal vein occlusion
Anterior Ischaemic Optic Neuropathy:
how do you treat central retinal vein occlusion
identify and treat risk factors
intravitreal anti Vegf
symptoms of anterior ischaemic optic neuropathy, giant cell arteritis
loss of vision headache loss of appetite scalp tenderness pain on chewing
signs of anterior ischaemic optic neuropathy, giant cell arteritis
tenderness of superficial temporal arteries
raised infammatory markers
management of anterior ischaemic optic neuropathy, giant cell arteritis
High dose systemic steroids
what causes gradual loss of vision?
Cataract
Glaucoma
Age related macular degeneration
Diabetic retinopathy
what is cataract?
gradual opacification of the lens
what are the symptoms of cataracts?
loss of vision
dazzle/glare
what is the management of cataracts?
surgery (phacoemulsification
with intraocular lens implant)
what is glaucoma?
optic neuropathy with typical optic nerve damage and associated visual field changes usually associated with raised intraocular pressure
classification of glaucoma?
open or closed angle
- chronic or acute
symptoms of glaucoma?
assymptomatic
gradual loss of peripheral
field of vision
signs of glaucoma
raised intraocular pressure
visual field defects
optic disc damage
