Flashcards in Vision Problems 1 Deck (28)
Gradual progressive loss of vision should always be watched closely as it may indicate...
Sudden loss of vision in one eye in older adults generally suggests what type of problem
Sudden loss of vision in kids
Transient vision loss in one eye
Transient loss of vision in both eyes
Basilar Artery Insufficiency
Short lived loss of vision in one eye (just a few seconds)
Numerator in 20/20
miosis (constriction), convergence, accomodation
The presence of a non-reactive pupil in one eye that does not respond to consensual stimulation indicates the presence of a defect in the efferent arc of the pupillary reflex.
And if that non-reactive pupil reacts to consensual stimulation then the abnormal pupil is non-reactive due to defect in the afferent
A scotoma in only one eye is usually associated with
retinal or optic nerve lesion in that eye
One of the common causes of optic nerve disease in young to middle aged pts is optic neuritis. What are the complaints in optic neuritis
Loss of central vision
Positive RAPD (abnormal)
Fundus exam will show either a normal optic disc or a swollen optic disc
Patient will complain of loss of color brightness.
when the scotoma connects with a physiologic blind spot
Natural history of optic neuritis
Vision gets poor quickly and then returns to normal slowly. Usually vision returns but if the initial epsiode is severe or rerepeat episodes occur, you may get permanent loss.
Treatment for significant visual loss due to optic neuritis
Optic disc looks normal
Optic disc swollen
Telling the difference between Papilledema and Papillitis?
- both discs usually involved in papilledema and only rarely with papillitis.
- Patients with papilledema will not usually have an RAPD (Relative Afferent Pupillary Defect) based solely on the disc swelling. Patients with Papillitis will.
_ visual acuity usually normal in pts iwth paiplledema
Optic neuritis generally seen in what dz
Lesion at optic chiasm
Reduced VA in one or both eyes
Bitemporal hemianopsia- blindness in the outer half of the visual field of both eyes
Optic atrophy- asymmetric
Most common cause of a lesion at the optic chiasm?
The more aneterior the lesion is located in the post chiasmal pathway....
The more incongruus the visual field is
The more posterior the lesion is located in the post chiasmal pathway....
The more congrupous the visual field defect usually is
Two most common causes are
2) Pseudotumor cerebri
Ischemic optic neuropathy
- acute loss of vision in an older pt
- usually only one eye
- afferent pupl defect present
- disc is sollen and pale
- Visual defect generally altitudinal... that is it is superior or inferior and respects the horizontal midline where optic neuritis respects teh vertical midline
Must rule out what with optic neuropathy
central retinal artery occlusion appears like what on fundic exam
Optic disc will be pale and arteries narrowed
TEMPORAL ARTERIRITS MUST BE RULED OUT