<prompt> Following are the causes of sudden loss of vision exceptAngle closure glaucomaEndophthalmitisCentral serous retinopathyCorneal ulceration  <response>: Sudden painless loss of vision Central retinal aery occlusion Massive vitreous hemorrhage Retinal detachment involving macular area Ischaemic central retinal vein occlusion The sudden painless onset of defective vision Central serous retinopathy Optic neuritis Methyl alcohol amblyopia Non-ischemic central retinal vein occlusion Sudden painful loss of vision Acute congestive glaucoma Acute iridocyclitis Chemical injuries to the eyeball Mechanical injuries to the eyeball Corneal ulceration causes Gradual painful defective vision Reference : AK KHURANA COMPREHENSIVE OPHTHALMOLOGY, Edi4, Page-462 