Opth

🌂Sudden painless loss of vision
🔺Central retinal artery occlusion
🔺Massive vitreous haemorrhage
🔺Retinal detachment involving macular area 🔺Ischacmic central retinal vein occlusion

🌂Sudden painless onset of defective vision
🔺Central serous retinopathy
🔺Optic neuritis
🔺Methyl alcohol amblyopia
🔺Non-ischacmic central retinal vein occlusion

🌂Sudden painful loss of vision
🔺Acute congestive glaucoma
🔺Acute iridocyclitis
🔺Chemical injuries to the eyeball
🔺Mechanical injuries to the eyeball

🌂Gradual painless defective vision 🔺Progressive pterygium involving pupillary area 🔺Corneal degenerations 🔺Corneal dystrophies 🔺Developmental cataract 🔺Senile cataract
🔺Optic atrophy 🔺Chorioretinal degenerations
🔺Age-related macular degeneration
🔺Diabetic retinopathy 🔺Refractive errors

🌂Gradual painful defective vision

🔺Chronic iridocyclitis 🔺Corneal ulceration 🔺Chronic simple glaucoma

🌂Transient loss of vision (Amaurosis fugax)
🔺Carotid artery disease 🔺Papilloedema
🔺Giant cell arteritis 🔺Migraine
🔺Raynaud’s disease 🔺Severe hypertension 🔺Prodromal symptom of CRAO

🌂Night blindness (Nyctalopia )
🔺Vitamin A deficiency 🔺Retinitis pigmentosa and other tapetoretinal degenerations
🔺Congenital night blindness
🔺Pathological myopia 🔺Peripheral cortical cataract
🌂Day blindness (Hamarlopia)
🔺Central nuclear or polar cataracts
🔺Central corneal opacity 🔺Central vitreous opacity 🔺Congenital deficiency of cones (rarely)

🌂Diminution of vision for near only
🔺Presbyopia
🔺Cycloplegia
🔺Internal or total ophthalmoplegia 🔺Insufficiency of accommodation
Whch antigen of salmona used in Epidemiological typimg???